Rating: 
Summary: cool but not that fantastic
Review: I have been using this mouse for 2 month now, I start to NOT liking it. It's heavy, the position for the fingers is not very comfortable (my right hand even feels pain), my shoulder feels weird too, and the mouse drains battery BIG TIME!!!. Since I am using it on a Mac, and I turned off the Microsoft Mouse control, I don't get so much of those jerky movement PC users had experienced. But still, I'd rather go with the ones got a cord on, they are lighter, smaller and more accurate.
Rating: 
Summary: Great product - I won't miss my mouse cord!
Review: What a great product. Don't quite understand the problems other folks have had with the mouse's tracking speed - mine works great with all my apps.Software installed without a glitch and Win98 recognized the USB connection and associated the correct driver. The old mouse is packed away in the closet. Buy it!
Rating: 
Summary: Great, with some problems
Review: I have been using this mouse for several months now. Basically it's a great product. It works accurately and has a variety of useful features, which you can read about in the other reviews and the product description. I will mention that the "back" and "forward" buttons are very useful. It's also nice to have all the buttons programmable to a variety of functions. I love having it wireless, in part because my arthritis requires me to use it in different places, and in part just because it's nice not to have a cord dragging at it constantly. I did not have any trouble with RF or any other noise (mentioned in another review), but I'm at an age where I don't hear high frequency sounds as well as I used to. There are several small but significant problems. (Note that I am writing based on my experience with my own mouse alone.) The most serious is that left-clicking doesn't always register: it is possible to left-click and hear the click sound without the mouse recognizing that a command has been issued. Firm clicking always works, but it's an extra effort to do this and an annoyance when the click doesn't register. Second, the mouse moves smoothly for big movements, but I find the slight static friction of its four feet annoying when I have to make repeated, small movements -- say, clicking on close-together objects. (Static friction is larger than rolling friction.) It may be that applying silicone spray to the desk or other surface will solve that problem, but MS should have stated what would help. Third, the mouse only comes in one size (too small for me; for reference: my hand is 3.5" across the base of my four fingers and 8" from tip of middle finger to wrist crease) and one shape (asymmetrical for the right hand). Its size makes it slightly difficult for me to reach the thumb buttons, and I think manufacturers (esp. big ones like MS) have a responsibility not to contribute to the oppression of left-handed people. (Understand that I'm right-handed.) Fourth: On my old mouse, holding down the scroll button and moving the cursor would move the page as a whole around (up & down, left & right) if it were larger than the screen. The same facility seems to exist on this, but it is inexplicably located on the front thumb button, so that after one moves around, the mouse then executes whatever operation it is set to. On mine it is "back", so when I move a screen around in my web browser, I am thereafter automatically sent to the previous page. There seems to be no way to program (or deprogram) this facility, which I find very strange. In sum, I like the mouse very much but withhold the top rating because of these faults (and because MS should have noticed and corrected them during development).
Rating: 
Summary: Save Your Money
Review: I bought one of these and it doesn't work for beans. It is worthless. Save your money.
Rating:
Summary: Totally Unsatisfied
Review: The delay in the pointer starting to move makes it almost unuseable. Takes a great deal of eye strain and concentration watching for the pointer to start moving then to position it. Compare that to any other mouse I have used (including wireless) and moving the pointer is almost automatic. I've only had this mouse a couple days, but I doubt that I would get used to it. It was also difficult to move on a couple different types of mouse pads that I had. Finally tried a plain white piece of paper and that seems to help the "heavy" feeling, but doesn't solve the problem with the delay in movement.
Rating:
Summary: Useless to me
Review: Bought the USB wireless Explorer for more accruracy. In slow, deliberate use as in AutoCAD it just loses the start of movement. So if you are moving it s-l-o-w-l-y as must often be done for accurate picking of intersections, etc. it is worthless. I can drag the mouse very slowly clear off the table without moving the cursor. This renders is useless for me.
Rating:
Summary: It's movements are very slow
Review: This product of Microsoft I bought as a "Last Technology" and I guess that it will be the best. But it works very slow; motions of the pointer are very slow.
It's not only slow but also very heavy because of the two batteries on it.
Also it's mass is vey big; i.e. it's not designed for a poeple with normal and small hand size.
It doesn't satisfied my needs. In this case I think that my old mouse will be the best technology for me now, and also I'm sad for the money I gave for this product.
I hope Microsoft will imporve this great idea with tecnology better.
Rating:
Summary: Not for gaming.
Review: The wireless feature is nice but this mouse is a diasppointment. I bought this mouse thinking it would improve Unreal Tournament gameplay but there was no improvement in smoothness or precision. It was worse than logitech ball mouse I already had. I'm returning it to try a new Logitech mouse.
Rating:
Summary: A real pleasure to use
Review: Here's what I like about this mouse (and yes, I would buy it again!): Works on almost any surface, the ergonometrics are wonderful, the installation was trivial, and (of course) it's wireless. Worth every penny. The only caveat is you will definitely want to use rechargeable batteries (I've always used 'em, but unless you're prepared it can be a bit of a nuisance).
Rating:
Summary: Bad experience...
Review: I wanted a new mouse - after all, the Logitech serial port mouse I was using is from 1993! (although it's still working well). My main thing, was that I wanted precision, since I play 3D First-Person-Shooter videogames, such as Return to Castle Wolfenstein, Quake III, Unreal Tournament, etc. With my existing very low dpi mouse, I knew I was at a disadvantage, especially when using sniper weapons. When I stumbled upon this mouse, I was undecided between it and the Logitech wireless mouse. Then when I read that this mouse was so great, and it had 6,000 dpi - I thought, well this mouse must be the best mouse out there on the market. Boy, was I wrong. Ok the wireless part - if you care, I have to say, works well. I have no problems at all. You plug the receiver in the USB port, boom, Windows picks it up, and you can use your mouse immediately without installing additional software. The part that shocked me was the precision - at 6,000 dpi, I was expecting the smoothest mouse on earth. This thing SUCKS AT PRECISION! Immediately I thought I had a dud, because I thought to myself that there was no way that when I move the mouse cursor around the screen that a 6,000 dpi optical mouse jerks around. But that's exactly what it does - it jerks around. When I was playing games, this got SO frustrating, that believe it or not - I was forced to start using my 1993 serial port Logitech mouse, which is much smoother. It's amazing. I am going to complain to Microsoft about this, because I really think that this isn't normal. Like another user said, the sensitivity seems to have been sacrificed for the wireless capability - which makes no sense to me, but that's the truth. You will be very dissappointed with this mouse because of the jerky movements. Other than that, the wireless feature is cool and works well, and that's the only reason I give it a 2. Otherwise it would have been a 1. I'm back to my serial port mouse again.. and I can control my computer much better. Oh well, I threw 70 bux out the window.
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