Rating: 
Summary: Not what I needed
Review: Just a quick report on my experience with this mouse. I'll start off by mentioning that perhaps I had unrealistically high expectations...
First off I should mention that I already own it's sister mouse, the MX700, which I use with windows XP, using the standard generic drivers - i.e. I didn't install the Logitech drivers. It works great! I recently got an iBook with built in Bluetooth. It seemed that the MX900 would be perfect - A great mouse, no wires, and also a bluetooth hub which I could plug into the winXP box and use for wireless internet between the two computers (Yes it CAN be done). Well the MX900 connected to the iBook easily enough. I got the 4th & 5th buttons working with Expose, but the mouse doesn't move right. When plugged into Apple's bluetooth it develops really horrible acceleration, which make it a real pain to use :( Anyway I though so long as I can get the wireless internet to work then I won't mind so much. After a lot of messing around I got a bluetooth network set up on the winXP desktop machine. After even more messing around I got as close as it seems possible to get to getting Bluetooth networks set up on OS-X. Basically OS-X doesn't really support them I found out :( So I'm going to return the mouse. Hopefully I can swap it for a normal wifi router - I just won't have a cool mouse to go with it :( Oh one weird thing I noticed - the build quality of the MX900 (bought in the US) isn't as good as my MX700 (bought in the UK). Bizzare seeing as they look essentially identical. The MX900 just feels cheaper, the buttons rattle etc. However I should add that if you intend to use the mouse for a normal destop PC then it's still a great purchase, and probably the best mouse you can buy - I think the extra $40 (over the MX700) is worth it for the bluetooth - if you need it.
Rating: 
Summary: Souped up MX700 adds Bluetooth to your desktop!
Review: Logitech has done it again! They have been able to design a mouse that meets and exceeds a users needs. Long before the full implementation, Logitech has brought out a whole line-up of products that utilize the Bluetooth wireless technology. There are many advantages to this, which we will cover in this review. Today we will be looking at the MX900 Bluetooth optical mouse which is not set to debut in stores until January 2004! The MX900 looks identical to the MX700, acts in exactly the same way, but utilizes a new wireless technology that allows the users computer to interact with other Bluetooth compatible devices such as cell phones, PDA's, printers, palmtops, microphones and headphones to list a few. (Full review @ bytesector.com)
Rating: 
Summary: The best wireless I've ever used!!!!
Review: Of the other wireless devices and mice that I have used, this one is the best one by far. I love the bluetooth hub which does away with getting a separate bluetooth adapter. The mouse is just great and the feedback is just awesome. It works great with all the apps and I love using the back and forward buttons. Helps me greatly while browsing the internet. As for the application switcher, beats the hell out the the "Alt+Tab". This is a great mouse for ppl on the go. I have bluetooth built in to my laptop, so I leave the hub at home with my desktop and just use the mouse. The mouse has 2 AA size rechargable batteries, so whenever I am on the go and need to recharge them, I just take along 2 extra AA batteries. Great MOUSE!!! MUST have!!!
Rating: 
Summary: Not great for laptops with built-in bluetooth
Review: Same as the MX700 but now with bluetooth. I tried this with my Dell Precision M60 hoping to use it without the included bluetooth hub since my laptop already has bluetooth but it just didn't work as good as I'd hoped. When you don't have the hub plugged in, mouse settings can't be changed and are are not remembered from session to session. Some driver tweaks down the line may make this as great as the MX700 but until then no reason to upgrade if you are wanting to use it with built-in bluetooth.
Rating:
Summary: Almost perfect, like WOW with Exposé
Review: Size, weight, lag, tracking accuracy, and compatibility with my Mac. These were the issues on my mind as I was reading up on this mouse, since I'd never actually seen it (or its half-wired cousin, the MX700) up close and personal. My online research wasn't turning up any answers to my satisfaction, so finally I decided I'd just take the plunge and order it. If you're interested in the gory details, you can keep reading; otherwise, suffice it to say that my doubts were almost completely unfounded. Really, I've never been this happy about a peripheral in my life. Size and weight: True, it's not particularly small or light. But nor is it the giant lump of dimpled lead I'd pictured from the reviews I'd read. If you can imagine a 12oz can of soda split in half lengthwise, you're in the ballpark for size and heft. It's a lot more ergonomic than that, of course. I've got small hands, and it feels perfectly natural in my palm. And it doesn't hurt that it's got Teflon pads on the bottom to help it slide effortlessly across your desk, or pants leg, or pants leg of the passenger sitting next to you. Still, I can see how it might be uncomfortable for lefties or for people with really huge hands. For what it's worth, my MX900 has been round the block with big-handed fellows and fellowettes alike, and nobody's complained yet. But there's no left-handed model as far as I know, and that's a shame. Lag: This has historically been a problem with wireless mice, a problem whose potential for annoyance can only be expressed with the help of nasty words. Fortunately, the MX900 has no noticeable lag at all. None! Give the mouse a little shove and the pointer tracks across the screen immediately. (Being curious, and a huge nerd, I wrote a little script to time the lag, however imperceptible. It turns out the MX900 is actually 5 to 10 milliseconds FASTER than my old USB mouse, a late '90s model Logitech. This was on a 867MHz PowerBook G4, if it matters to anyone.) Tracking: I used to own a Microsoft optical mouse that stalled the pointer if you dared move it any faster than the crosstown M23 (approx. the speed of a shuffling kwokleberry). By contrast, my MX900 keeps up with me even if I TRY to fool it. I can whip it across my desk as fast as I can and it has no problems tracking along. I'm no slowpoke, either. I outrun bullets. Finally, compatibility: If you believe what it says on the box, the MX900 only works with Windows PCs. Not so! It paired flawlessly, and securely, with my PowerBook's built-in Bluetooth hardware. I've got the two thumb buttons and the "Quick Switch" button assigned to Exposé, and now "je meurs un petit mort" every time I Exposé myself. I'm mystified as to why Logitech isn't advertising this feature. If you're not going to assign them to Exposé, however, you should be aware that until Logitech releases Mac drivers, the thumb buttons and "Quick Switch" won't do what they're supposed to (browser forward, browser back and switch applications, respectively). As I said, I've reassigned these buttons to Exposé--I suspect most Mac users will probably do the same--so I personally couldn't care less. Happily, the scroll up and down buttons work as advertised. Since my computer has built-in Bluetooth, I obviously don't need to plug the base into my computer. I only use it for charging. Goodbye, wires. Now for the negatives. I can't speak for everyone, but based on my own mousing habits, I count exactly two. Flaw #1: The middle buttons can be uncomfortable to reach when your hand's already in normal clicking position; you've got to contort your wrist and middle finger something fierce, particularly for the scroll up and "Quick Switch" buttons. Flaw #2: There's no power switch. Considering that this thing really shines when you're traveling, when you want to just throw your laptop and mouse in a bag without worrying about depleting the batteries, this is a huge oversight. My crappy workaround is to open the compartment and reverse one of the batteries, which is irritating, but air traffic control will thank me. And this mouse is expensive, really expensive. Fifty bucks more than its non-Bluetooth equivalent, the MX700. But then, a penthouse on Central Park West is expensive compared to the roach-infested basement where I used to live, back before I realized there are certain things in life it's not worth being a cheapskate about. I spend the majority of my working days mousing around, and I like to travel with a minimum of cords and dongles. For me, it's well worth the cost to mouse in luxury and convenience. Oh, and style. This is one fantastic looking mouse. It looks just as good as it does in the pictures on this website. Did I mention my basement apartment used to flood when it rained? Well, every time I'm forced by circumstance to use somebody else's mouse, it's like suffering through monsoon season in India. The MX900 is THAT good. In summary, I love my mouse and would recommend it in a heartbeat, especially to anyone who (1) owns a laptop with built-in Bluetooth--no more cords!--and (2) isn't cursed with left-handedness or monstrously large-handedness. Sorry, left-handed lumberjacks. I never thought I could wax effusive like this about a mouse, of all things, but there you have it. To use this mouse is to enter heaven--consumer-fetish heaven, the finest heaven of all.
Rating:
Summary: Works very well with Apple Powerbook
Review: The Logitech Bluetooth MX900 mouse works very well with my 15" Aluminum PowerBook. I do not travel with this mouse; rather, it stays in the office. I plug in my laptop to the monitor and click a mouse button and a few seconds later the mouse is connected and ready to go.
As Logitech provides no driver for this mouse for Apple, I can only use the left, right and scroll features of the mouse. The scroll button (clicking the scroll wheel) also works. However, the other buttons cannot be programmed for anything OTHER than Expose. For some reason, Expose recognizes the additional buttons.
I am waiting for USB Overdrive to catch up with a driver for this mouse.
In the meantime, this is one of the best mice I have ever used. The desktop charging crade does it's job overnight and the mouse is good for two 8 hour days of heavy use. I charge it overnight, so that is not a problem. It comes with a pair of anemic 1800 mAh AA batteries. You may want to get a pair of 2300 mAh AA batteries from Maha and it should give you two solid (or maybe three days) of use before recharging.
There is no off button -- not a big deal since I do not travel with it.
Very light weight and absolutely no latency problems for office use. I use the built in bluetooth in my laptop and the bluetooth hub provided by Logitech is only used to charge the mouse overnight.
I gave this 4 stars for the lack of mouse drivers for Apple.
Rating:
Summary: Nice, except for power management
Review: This mouse is great. I use it with my powerbook 15" as I'm a bit inept with the trackpad. I'm running linux on my powerbook and it works fine with that and it's possible to get most of the buttons working using xmodmap and imwheel with an appropriate X config of course. The power saving feature of the mouse is slightly annoying, but I can live with that. My major gripe with this mouse is that there is no on/off switch. It would seem to me that producing a bluetooth mouse is targeted at people using an external mouse on the move (As all the ibook and powerbook users in the above reviews testifies). The fact that the mouse works with any bluetooth hub/dongle/etc is additional weight to this argument in my opinion. However, the lack of an on/off switch is ridiculous in this situation as it means that you have to take the batteries out when your on the move because any small movement will make the mouse think its being used and hence not be in powersave mode. Puggy
Rating:
Summary: Not Great for Games
Review: This mouse will not work with Logitech MousePoint software. The 4th and 5th buttons will not work in games. When playing games it is not as responsive as other MX mice.
Rating:
Summary: Bluetooth!
Review: This mouse works just fine. It does everithing they said. Just took me a few hours to get used to the wireless.
Rating: 
Summary: Didn't work for me
Review: This product didn't work for me. I kept forgetting to put the mouse in the charging stand and the mouse would run out of juice almost on a daily basis. As an experiment, I replaced the rechargable batteries in the mouse with two regular AA batteries. The mouse only worked for about 3 days before the batteries were used up. As a point of comparision, an older-model wireless Logitech mouse will run 6 to 12 months on two AAA batteries. The external charger is also pretty klunky. I thought that Bluetooth was suppose to eliminate wires. The MX900 product actually adds new wires to my desktop, not takes them away. I switched back to a nice and simple wired mouse.
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