well, this is not so much a review as a re-iteration of what people ahve said all over the forums. i needed/wanted a Bluetooth mouse. after connecting my MX00 and have it working perfectly and just the way i want it with USB Overdrive, i just have to have a nice, full size mouse to complement my PB. i decided for the MX900. i was going to wait for the MacMice The Mouse BT that's supposed to come in September - if it's not delayed for the third time. but after using the MX700, i can't live without the extra buttons, especially the Expose button i configured into one of the buttons. coincidentally, the button i use for Expose is what's known as App Switching button in windows. heheh. so it's perfect. i set the other two button next to the scroll wheel as the other two expose button - they were originally meant for faster scrolling (cruising), but since that doesn't work yet, i use them for Expose. i'm a bit pissed at the fact that Logitech is so stubborn for not releasing a full driver for this mouse. it's perfect in every way except maybe size (to some people), and no Off Switch. but in Expose, ALL the buttons are recognized. if someone would just write a simple app to associate these other buttons to other apps other than expose, my problem is solved. so yea, connecting the mouse is as easy as detecting it and asking it to pair. all done through the BT Setup Assistant. no 3rd party app used. all OS X. i paired it, it instantly work. the right/left click, the scroll, and all the buttons are assignable to Expose. if i charge it, it shuts off, so connection is broken. when i take it out, it turns back on and instantly connects again and off i go. when i put the PB to sleep, BT is technically OFF, so connection is broken, and the mouse CANNOT wake up the computer. this is important because there is no off switch on the mouse. when you throw it in a bag, it will NOT accidentally bring your machine out of sleep. since the mouse can live up to 4 days without charge (assuming it has the same Batt life as my MX700), i find charging it every night is fine, even without the off switch, but it might be nicer to have it actually have a switch. if you replace the battery with higher capacity ones, it can last up to two weeks. great mouse.