I also have the BT V270 from Logitech. I feel comfortable as a laptop mouse (I don't have HUGE hands, but not small.), as I use it maybe ... 1 hour/day. Plus, I like the long battery life and the pouch .
Both the Logitech V270 and V470 are symmetrical, so they can be used left-handed as well as right. I use the V270 with my MBP and my wife uses the V470 with her MB Air. I like them both. The V270 looks better (with the aluminum MBP at least), but I find the V470 more comfortable to use - it has a better shape and seems to move, scroll and click more smoothly.