I have had the Logitech G7 for a couple years or more now and love it to death. The hotswappable batteries even after all this time still run a good 4-5 hours, then it just takes a second to swap in the freshly charged one from the base. It's a very accurate gaming mouse and it is the first wireless mouse I've had (ok well the 2nd one I've had, but the first one sucked I guess) that had the responsiveness one would expect from a corded mouse.