Summary: I originally bought the MX revolution back in March of last year. It seemed like a cool, multi-function mouse. It lasted about 4 months and then the battery light started flashing red. I contacted Logitech, and after having to spend $18 to ship the mouse back to them, and 4 weeks of waiting I got a replacement mouse and charger. That one only worked for about 3 months... the thing will not hold a charge. It works for about 10 minutes and then I have to recharge it.
Pros: Offers Good Styling, power reserve, and advanced controls, BUT...
Cons: CHRONIC LATENCY BEHAVIOR that COULD NOT be resolved by Logitech. Your thumb will OFTEN engange the "document flip" wheel so you inadvertantly begin switching to an other window. The "forward" button has never worked properly since I've owned it.
Summary: This is a great mouse - probably the best one I ever used. Unfortunately, the batteries are a wonky and the unit stops working after a week. Consider buying the notebook version which has standard, not rechargable batteries. Logitech support not very good, but that is par for the course these days in consumer products.