This is one of the best Cordless Laser Mouse I have ever used! I tried using the MX620 and M500, both with the so-called "hyper" scrolling wheel. Do not believe the ads, that hyper-scrolling wheel is crap! It keeps spinning after your scroll with your finger! If you opt for the 'bumpy' scrolling instead of the smooth, it still feels cheap and was impossible for me to use. This mouse is solid, has a good weight to it, is symmetrical (for both leftys and rightys) and has crisp, tight buttons. I also like the simple button placement of the Back and Forward buttons. It was super easy to setup on both my Mac and Windows 7 (via bootcamp). All buttons are also programmable with a simple control panel. I can't speak much to battery life since I've only owned it about a month but I expect it won't be a problem. The wireless receiver is also super tiny and I have perfect reception up to about 25 feet away. Needless to say this mouse is perfect for gaming, web browser (!!!) and everyday tasks. Plus its pretty cheap, and its Cordless Laser Mouse. Don't settle for those crappy Microsoft mice, get this one.