I just bought....well someone bought me a Logitech V270 BT mouse for my MBP and i wanted to know if its a waste of money. Personally i thinks pretty good, i wish it were bigger though, not so ergonomic. Also i wish i could see the battery level in OS X as you would a Mighty Bouse, so i know when to start looking out for new batteries. Its tracking is also very sensitive requiring me to drag the slider all the way down to slow but thats not really a problem...im nitpicking now. Awesome power management from the mouse as it goes to low power mode when not used. I can tell because when i move it after a while there's a slight hint of lag from the cursor but it returns to normal speed in less than a second. All in all im satisfied...hey it was free afterall.