I picked up a MS Intellimouse 5000 bluetooth. Liked the mouse, feel, comfort, worked on any surface. Thing had limited func in OS-X which I could have dealt with - but when I hooked up to the internet via bluetooth to my AT&T phone the mouse became unuseable. Would jump and skip all over the screen. I don't know if this is because it's an MS Mouse or what. I returned it and couldn't find a Logitech V470 local. I'm not totally against the BT mighty mouse - just not a fan of the scroll ball. Any insight?