Pros: I first got this mouse 9 months ago, when it came with my laptop when I bought it. I fell in love with the comfy rubber grip and pattern on the side. The buttons click really easily, and it reads almost all surfaces really well. (Glass tables are a no go. lol) The size of the mouse was designed really well, Nobody ever complained to me about the size of it, and it's really good to travel with. I was surprised at how long the batteries lasted, I left my mouse on overnight on several occasions and I use my laptop around 6 hours a day, and my first one lasted me 3 months before I accidentally broke the USB receiver. It also works great with gaming, I was able to play Counter-Strike: Source without any problems. You also don't have to install any software to get it working, you just plug it in and wait a few seconds on bad days. Overall, I like it so much i'm buying a third one.

Cons: The battery cover is slightly difficult to put back on after you take it off, and the USB Receiver sticks out and can bend or break off if you aren't careful (well that's obvious). I've had to replace the mouse twice from accidentally breaking the USB Receiver. Other than that, I haven't had any other problem with it and am perfectly content with buying it a third time for my laptop. (haha)

Overall Review: Just be careful not to accidentally bend or break off the Wireless USB Receiver when you use the mouse, Other than that, It's a well manufactured mouse for it's good price. and if feels durable enough, just dont throw it or anything. It's my favorite mouse of all time. I think Kensington made a really good product.