Rating: 
Summary: 40 dollars down the drain, thanks RadioShak
Review: I made the mistake of buying mine from RadioShaft because I was in a hurry. The mouse worked great at first. It did jump around for no apparent reason, mostly to the bottom left corner of the screen. Then it stopped working all together after about a week. Like so many others, I tried to fix it in vain. I tried to return it but according to RadioShark, when I threw out the packaging, i threw away my money back, although i had the reciept. Boo hoo. Never shop there, especially for this mouse.
Rating:
Summary: Don`t buy it, piece on junk
Review: This is the worst mouse I had. It is exxtremely jumpy. You can`t point anything in the screen, it feels like a Parkinson Mouse.It is also very slow, I`ve tried with the speed and nothing helps. This is not a good product so, don`t spend your money on it.
Rating:
Summary: Worked great, Until it died
Review: Installed and worked immeadiately . . . until it died 5 minutes later. The Win-XP Device Manager shows it is installed and working properly, but it no longer controls the cursor. Un-installing and re-installing did not fix the problem, nor did changing channels. What could possibly be the problem with these things?
Rating: 
Summary: Good for office applications, lousy with games!
Review: I think the title of my review says it all. I gave this mouse only 2 hours of use. It worked ok for using office applications like Excel or Word and fine on browsing the internet, but I was always left with the feeling it is slow and imprecise. When I tried it in Age of Mythology, it was downright too slow to work effectively. I could not click on my units as quickly as my regular Logitech Optical mouse, so I am returning MS' wireless blue mouse tomorrow. Note, I already upped the precision and mouse speed all the way to max, but it was still slow! I do not recommend this item as a gamer's mouse. Leave this to the internet surfers or business users!
Rating:
Summary: worked at first...
Review: I've experienced the same dilemma as the person from Ithica, NY.
This mouse worked great the first several weeks, but then the response became very jumpy. The batteries still seemed to be good because the LED was bright. I replaced with fresh batteries in spite of this, but it didn't help. I also tried to 'reconnect' the mouse many times and installed the intellipoint software - all in vain. Completely jumpy - you have very poor control over the pointer on the screen. Its too bad because the mouse has a cool looking design and it's nice that its wireless AND optical. Piece of junk now, though.
Rating:
Summary: Not working scroll bar
Review: I liked the mouse overall, but the scroll function didn't work. Very little "troubleshooting" in the software, Microsoft online support basically told me to reinstall drivers, etc. Even though I performed initial installation correctly, I redid it, with no improvement. I'll be returning it for a mouse that works correctly - I like the scroll wheel function in a mouse, and am not willing to trade it in, in case a mechanical problem, since it'd be at risk to not work again..
Rating:
Summary: Sending mine back....
Review: I have a Logitech wireless keyboard and Logitech optical mouse, both of which I love. But, I thought a wireless mouse would be great and I regretted not buying one initially. However, the MS Blue version is way too jumpy and nothing I adjusted really seemed to help. I'm back to my wired Logitech optical and sending this one in!
Rating:
Summary: Works great for a bit....
Review: The wireless optical mouse blue worked great initially--for a full two weeks. All the prior reviews on how great the mouse is seem to come from the first two week period. After two weeks, however, the mouse began to move erraticly and jumped on the screen. The quality seemed to degrade as the batteries lost power. After a month the batteries completely died. After replacing them, the mouse continued to respond poorly. I tried to change channels and the mouse would not connect to the receiver. The pointer stopped moving completely and now the mouse is unusable. Don't buy this mouse.
Rating: 
Summary: it's okay
Review: I just got this today, it's works great. I read couple negative reviews, I don't know what's wrong with them, I don't have the same problem. I use ps/2 instead of USB, and it works perfectly. It's really accurate too.
The only thing is it's not THAT comfortable as I thought it would be.
Rating:
Summary: My Microsoft kWireless Optical Mouse
Review: I like my wireless optical mouse. I no longer have that annoying wire and mouse pad to contend with. I don't have to worry about cleaning the roller. My desktop is uncluttered. Not only that, it is priced well. I comes with self-explanitory software, easy to install. Right and left mouse click can be edited if one wishes to do so. It's a good buy.
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