"Also the best mouse I've ever owned"4.5 starson by GuardianGanthet
Pros: Battery lasts forever. Extremely comfortable to use. Power switch on the bottom allows cleaning. System tray display shows battery level. Forward and back buttons for web pages. Scroll wheel does side scrolling also. Switchable scroll wheel click.
Cons: Recessed hole for laser and sensor accumulates cat hair which must be cleaned out about once a month. Tiny button for "application switcher" is too easy to hit accidentally (I reprogrammed it to "zoom reset").
Summary: Logitech is going to go broke if they keep making products like this. It's durable, it's comfortable, and it works well, so where is the incentive for me to replace my mouse regularly? The setup application for it works with my Logitech K350 keyboard too, so I won't get tired of the software either. Unless the ceiling falls in and crushes my keyboard and mouse, I will never want to replace them. Thanks, Logitech!