Rating: 
Summary: Almost perfect
Review: I love almost everything about this mouse. Wireless, optical, comfortable, sleek-looking and a joy to surf the net with (because of the 2 extra buttons on the side for FORWARD and BACK). My ONLY beef is with the fact that it eats batteries at a clip: about 2 AAA batteries per month or less. If and when I find a comparable product at a comparable price that recharges in a cradle, I will get it.
Rating: 
Summary: An avid gamer
Review: I've used friends' mice and kept up on reviews but, this product was the first optical mouse and first wireless mouse I have owned after 6 years of FPS gaming.When I took it out of the box, the ergonomic, silky-smooth fit with my hand was just perfect. The thumb buttons were especially well placed for quick clicks in battle. The extra buttons did not have any problems binding in-game either, unlike some of the new logitech line had issues in. However, there was one fatal flaw I discovered the instant I started scrolling around the desktop. The cursor had a slight delay (for approximation's sake, let's say about 50ms or .05sec) in movement. I tried changing around the mouse sensitivity, checking if acceleration was somehow on, enabling/disabling frame filtering, and so on. That didn't make any progress so I tried changing surfaces: detailed wood, standard plastic and cloth mousepads, plain paper, paper with a lot of printing on it (only to notice that that made it even skip around in extreme turns), etc. I also tried my luck on switching frequency channels and new batteries, no go. This may not be a major issue or maybe not even noticeable to te average joe, but personally made me return it (after trying hard as hell to fix the laggish movements). Expecting it was probably because of the delay in wi-fi, I ordered the wired version of the same Intelli Explorer just now. Let's see how that goes. :P
Rating:
Summary: A "SUPERB MOUSE" THAT REQUIRES CAREFUL SET-UP !!
Review: Many of the comments about this mouse regarding pointing difficulty and locational control are true. HOWEVER, I found by putting this otherwise superior mouse on a VERY DETAILED SURFACE (such as wood grained computer station or similar surface), OR on an "Optical Mousing Pad" that this somewhat temperamental mouse becomes ABSOLUTELY FABULOUS!! I have 10 years operating experience with computers and this mouse is one of the top 2 or 3 "buys" I have ever made on a peripheral item. ERGONOMICALLY, I find this mouse to fit my hand better than any other. My hand is averaged sized ( male - size 10 glove ). CONSTRUCTION WISE, I feel it is equal to or better than any other cordless unit I've tried. The "SCROLL WHEEL" in my opinion is SUPERIOR to the that on other competitive units. And I have owned all of the major brands. It is absoultely silky smooth. THE SOFTWARE that comes with this mouse is much more creative and user friendly than any others I have tried. MY POINTER works just as well as my corded mouse after careful adjiustment. Very, very little lag at all. Only an exterme gaimer would notice this. *** All of the pointing problems mentioned by other reviewers "Go Away" immediately when this mouse is put on a "DETAILED" & BUSY" surface. The newer mouse pads offered here locally or elsewhere are worth the investment ...The product literature should have mentioned these requirements more clearly. I only found out by "mistake" after removing my mouse pad from my computer station tray, which is finely detailed wood grained laminate & very smooth. I am totally staisfied with this mouse after one weeks use. The hand comfort is unmatched by any other "right handed" mouse I have tried. HERE ARE MY SUMMARY GRADES FOR THIS MOUSE: ** HAND COMFORT - Excellent ++++
** CONSTRUCTION - Excellent
** CLICK RESPONSE - Very Good / "No Misclicks Yet"
** MOVEMENT / SLIDING ABILITY - Excellent (Large Pads Underneath)
** POINTING ACCURACY - (On Detailed "Busy" Surfaces) Very Good +
** OPERATING SPEED - Very Good +++
** SCROLL WHEEL - UNBELIEVABLY GOOD ++++
** SOFTWARE - Very Good (Very Adjustable Controls)
** UNIT WEIGHT - Acceptable (Pads Make Up For This) I do not know about the battery life yet, but decided to go with this unit over the rechargeable units available because in my opinion, a rechargeable item "Loses Operational Capacity" as it nears the next recharge stage. I personally do not like this drawback. And I do not like to be surprised by power losses. Even though the "rechargeable units" warn the user of impending power loss, the operational degradation creeps up imperceptably before it is recognizable in my opinion. I would rather buy new batteries which replace in 2 minutes as opposed to 1 hour for a minimum recharge. I hope this review is helpful to all of you out there in the buying market. I took the time to write this review because I feel this unit has taken some unfair criticism in light of my surprised discovery of how well it really works when put on a proper surface. I almost didn't give it a try because of these comments I read. I would have been sorry. This is a great mouse! Thank you - RK
Rating: 
Summary: Two for Two with One Possible Caveat
Review: Prior to this mouse I had been using the Microsoft Intellimouse Explorer for at least 3 years. I digress to include the hardware I have as it may help explain the noise issue that other reviewers have raised, but I have not experienced at all. My computer is 6 months old, Pentium 4, 2.0Ghz, I use a traditional CRT monitor, and the mouse is the only piece of wireless equipment I use at present. I do plan on adding a wireless keyboard, but at present it is a traditional wired design. I tried moving the transmitter nearer and away from various components but I could not create any interference in the form of noise or any other problems. I also watched a DVD feature film, and again there was no issue of interference. The manual is very brief but is specific about what the receiver should be kept away from, and the distance of 8 inches that should be maintained. It also specifies a PS/2 connection when using Windows. My version is USB only and again no issues. The previous mouse was also a USB connected device. I never looked at the manual until sitting down to write these comments, for the installation did not require it. I am running Windows XP Home, and once plugged in; the necessary software/drivers had already been detected and installed via plug n play, prior to even reaching for the installation disc. Installation does not get any easier. The installation disc is still unopened in its package. There is one major issue that needs to be considered if you choose the wireless pointing device route, and that is batteries or a rechargeable cradle like Logitech offers. The need to change batteries will become an issue depending on the frequency they need changing, and I use the device many hours per day. The rechargeable has the obvious advantage of no replacement of batteries required. However unless those manufacturer have solved the problems of rechargeable batteries having a tendency to develop a memory, that could offset the advantage of the rechargeable versions. So there may be an ease of use over the near term, and a trade off in the long term. My final advice would be to read or ask some people who have tried the rechargeable version for their thoughts. The other reason for the choice may seem hard to justify, but to the extent I have hardware designed and built by/for the same manufacturer, I prefer the option, nothing objective I can offer as evidence, just a feeling that a common denominator is preferable. The device is very sensitive, and very precise, and that would seem to be an issue that is adjustable, I have not had any problems with it developing a mind of its own and strolling around the screen.
Rating:
Summary: Say it with Me....rechargable batteries
Review: Love it. Does use batteries pretty quick but I got a set of rechargable NiMH's and keep a set in the charger ready to go. I do all kinds of work including gaming and have no problem with it. Planning on buying one for my dad for x-mas.
Rating: 
Summary: Worthless
Review: I will be returning this mouse as soon as I write this review. The MS Wireless Intellimouse Explorer fits well in your hand and the forward and back buttons work well, but the lack of precision in placing the cursor makes this mouse completely unacceptable. Even after several days of intense practice and trials of different settings and surfaces, placing the cursor where I want it is almost impossible. Much worse than my old corded mouse. Any benefit of being cordless is more than lost by the imprecision of the cursor placement. I do not play games; I am just using this for word-processing. Do not buy. Either stick with a corded mouse or pay up for something like the Logitech MX700, which I have tried and is as precise as my old corded mouse.
Rating:
Summary: Great Product and Doesn't Waste Battery
Review: I personally have had no problems with battery life. (It's a little heavier because of the batteries, but you get used to it..) The mouse is EXTREMELY comfortable, and I've been using my mouse for well over a month without changing the battery once. I'm a college student, so my computer is on ALL the time. I highly recommend this product!!!
Rating:
Summary: A complete battery HOG, and I'm getting rid of it today
Review: ... I really prefer the ergo design too, which is why I bought it. The wireless was never a benefit for me, and if anything it was a total downer because it required batteries -- lots and lots of batteries! Turns out this thing is a total battery hog. I'm changing batteries every few weeks, and I have even had to scramble to the store just get more batteries. This was a terrible investement on my part. I joke that I have a mouse with a drug addiction, it's that needy. ...
Rating:
Summary: Not for Gamers
Review: Just try and play Q3 or some other FPS type game with this mouse..AHH! I have an oak desk and this thing follows the grain in the wood, [poopy] mousepads are the reason I got this thing. The wired version of this mouse was super but this one eats batteries and is too jerky for accurate mousing. If you have a very smooth desktop with no characteristics in it then you might find this product useful, otherwise look at the new Logitech version with a higher dpi, I've not tried it but I've read great reviews about it.
Rating:
Summary: Very Short Battery Life
Review: No mouse should require new batteries every week, if you want wireless buy a Logitech cordless non optical, the batteries last on average 4-5 months.
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