Summary: Wanted a wireless for my laptop. Works great.I didn't realize that you still have to have an adapter plugged in the back of the laptop so it can be wireless. But I don't see it and it's out of the way.
Summary: I hoped that a Microsoft mouse would work well with Windows 7 Ultimate Edition, but I was wrong about that. The mouse feels pleasantly solid and substantial, but is a little too heavy to give fine control for games and the like. Often I find it overshooting or undershooting, which sometimes results in unintended consequences - such as clicking on the wrong button or moving a chess piece to the wrong square.
Summary: Don't let the low price put you off. I have been using this mouse for the past ~3 years and it does exactly what it says on the box. It works! If someone is looking for a durable standard size wireless mouse, this is the one to go for! Normal batteries last about 1-2 months, depending on the usage (alkaline batteries do last about 2-3 months with daily usage / gaming). The wireless transmitter is a bit bulky, yet not an issue for desktop computers and stationary laptops.