Pros: it is accurate, comfortable (for my child) and works FAR better than the rf mouse i got from Logiteh. glad i decided to buy this puppy.

Cons: Science!

Pros: Works nice, light, solid, good clicking as you scroll.

Cons: I only purchased a Microsoft mouse because I I like the Microsoft software. It used to be "intelimouse" now it's "Mouse and Keyboard Center". I was using a cheap MS Mobile mouse 3000 that is falling apart and this was supposed to be a replacement. When I plugged it in, the software told me that there is no MS product detected. Through some searching I found a page that said this mouse is not supported by that software, told me to install the old "intelimouse" software. So I did that, first 8.2, then 7.1, neither worked. Next I called MS and they told me that they can't find anything as far as drivers or software, but they said they could look on the internet for me, but it will cost, yea right, like I'd pay them to google it for me.

Other Thoughts: Again, if you don't care for the software, it's a good mouse. I like to use the scroll accelerator, and make the wheel click so it acts as a double click.
Newegg already took care of the return, they always go above and beyond for their customer.

Pros: I have to admit I, I thought I'd be getting something a little less satisfying, but the buttons have nice clicks, the scroll wheel "notches" are nicely delineated and it's easy to get just one notch or click.

It tracks nicely and at three feet, I haven't had any signal problems.

Cons: Mine shipped from China. It must have been brought by boat or something because it definitely took every second of the maximum allotted time which is pretty generous.

Pros: Exactly as described, comfertable to use in general.

Cons: none that I've come across so far, working great for my kids.

Pros: Bought to use with a desktop, it works better than expected. I also like that it only uses one battery.

Cons: none

Pros: The dongle is small enough to leave in the USB when I pack it away for travel. It works with no issues for me. It's not too small for normal hands and not to big to keep with the notebook when traveling. I hate touchpads, so I always use a mouse.

Cons: No issues have been found

Pros: The price and the wireless option. A good portable mouse you can pack everywhere, specially for your laptop needs.

Cons: The battery ads enormous weight at the bottom of the mouse, making it bulky and imprecise mouse for those with claw, fingertip grip or big hands. Don't even try this mouse if you have fingertip grip like me.

Also, the wireless receiver doesn't like some of my other wireless devices, making the cursor erratic at best, and giving stuttering at constant use.

Other Thoughts: If you have a very low budget, and you don't play seriously with this mouse, you can't go wrong. Those looking for a portable mouse, this can be a bang for your buck. The rest with big hands, more-than-two wireless devices near, and desktop users, avoid it.

No word on battery life yet, but Microsoft promises 6 months with a single AA.

Pros: Bought for a friend to use with his new laptop. It is perfect for that application especially since he has smaller hands. Work perfect right out of the box.

Cons: None.