Does anyone have experience using the Kensington Pilot Mouse Bluetooth with OS X? If so, I'm curious about a few things: 1) How well does it integrate with OS X? Does it require extra software for full functionality? 2) Any issues with it draining batteries, waking up from sleep, etc? 3) General thoughts compared to Apple's Bluetooth Mouse? 4) Other thoughts on the best bluetooth mouse for a mac? See Kensington's page about the mouse here. Thanks for your input.