Rating: 
Summary: A few hangups, but overall fantastic
Review: I'll get the negatives out of the way first: the mouse is indeed heavy, mostly because of the weight of its batteries, it does gobble the batteries at an alarming speed under my admittedly very heavy usage- every two or three weeks it needs fresh AA's, and it has connection issues, occasionally losing track of itself and flinging the pointer into the lower left hand corner, or the only real annoyance, hanging and refusing to even be recognized as a pointing device, requiring some mystical combination of resetting, popping batteries in and out, yanking my USB devices and five or six cold boots. I'm not convinced, however, that this is not the fault of my bus or (gasp) Win98.All of this is worth it. I waited specifically for a Logitech cordless optical mouse for years, and was not disappointed. No hangups, even on my weird, slightly reflective mousepad, my clear glass desk (!) or my lap. It's so wonderfully comfortable, a little bit ergo and with no cord, it's less strain to push it around than it was to keep yanking it. The insane speed (which I like) and weight were easy to become accustomed to. Well worth the money, but after this you'll cringe whenever you see a mouse ball.
Rating: 
Summary: OUCH !!!
Review: This is the MOST ergonimcally unfriendly mouse I have ever used.
After using it for just 5 or 6 minutes, I have to shake the cramps out of my hand. It would be a great mouse if it were designed a little better ... but it is literally painful to use!
Rating: 
Summary: PC Integration
Review: While the Optical mouse may work well, the out of the box install did not work on my standard Dell PC. My guess is that there is an interrupt incompatability. Not wanting to figure this out, I went back to my standard Microsoft mouse. Until Logitech comes out with a 6 step way to take their mouse an adapt it to standard hardware, I would avoid it unless you like messing with your system.
Rating: 
Summary: Worth the investment
Review: Sure it's more expensive than a traditional corded, non-optical mouse but it's worth it. Very quick and problem less installation on my Win2K Pro system. Four buttons (including wheel) provides all the control surfaces one typically needs. I've never found it lacking in day-to-day work or gaming use. The only two potentially negative aspects are the weight and need to replace batteries. At first it did seem a little heavy (due to the two AA batteries) but after a couple of days of use I don't even notice it now. On replacing the batteries, I use my system ~2 hours every other day and have had to replace the batteries twice in 6 months. Just buy yourself a bulk pack of AA batteries and stick them in your desk, it isn't good if your batteries die and you have none handy.
Rating:
Summary: good, but...
Review: First of all this is the one perfect mouse for most folks. It is sooo easy to pick up quickly when you run off the surface. The problem for me is it doesn't have enough buttons, but for most people this mouse is more than perfect.
Rating:
Summary: Outstanding Product
Review: Very precise, great range - probably the best cordless mouse available. Tracking as good as any corded mouse I've used. For anyone considering the Microsoft Wireless Intellimouse Explorer, I offer the following thoughts... What an incredible disappointment it was. It had great ergonomics, but tracking was horrible - stuttering and failing to detect clicks made it impossible to use (maybe it's because of the USB-only connection). Save yourself the hassle and get the Logitech mouse.
Rating:
Summary: This is a great product ...BUT...
Review: I have mine hooked thru a usb hub. Everytime something else on the hub starts up... the mouse locks. Sent Logitech an email asking if there was something I could do but their response was that no Logitech products are checked out for use on hubs. If you aren't going to be using a hub it is great!
Rating: 
Summary: Not as precise
Review: I got this mouse cause I knew of the preciseness of the optical mice, and I was normally a fan of the Logitech products. But, I do have to say this isn't as precise as I required. For some reason, this mouse does little 0.5 second stalls, almost constantly. Simple test of mine involved moving the mouse in a small 1 inch up/down motion to see where the point ends up.
It never stays in place on the screen, but rather at the very top or bottom of my screen eventually. All that time I didn't move the mouse more than 2 inches on my desktop. For an every day use mouse, something that doesn't require as much preciseness, it's a great mouse, but for what I do, it stalled too much for my uses.
Rating:
Summary: Best mouse I have ever seen
Review: What can I say, it just the best mouse I have ever use.
Rating:
Summary: Average Joe User
Review: I recently bought this cordless mouse based on the reviews on the Amazon site. I consider myself an average type computer user with average computer skills.
The installation of the mouse was for the most part a breeze. I plugged the mouse into the PS/2 port (the place where my old mouse plugged in) because my USBs were all in use. I loaded the software from the CD and rebooted the computer. The only small problem I had (which really wasn't that much of one) was I had to establish the wireless connection between the mouse and the receiver before I was completely finished with the installation because some of the installation required the use of the mouse. This really wasn't addressed in the installation instuctions.
Also my wife was reluctant to add the mouse to our system thinking that "if it ain't broke don't fix it". I think she's now sold on the benefits of going wireless. The mouse is a little heavier than a corded mouse, but it is much more moveable without the cord to hinder me. I really recommend it if you are looking for a cordless mouse.
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