I wonder if the Magic Mouse 2 feels different, or has anything different other than an internal battery (which to me is a drawback...right now I just use my own rechargeables that I can easily replace and continue using my mouse without having it plugged in to anything). As for the dimensions...it sounds like it is smaller...also a negative as it MM1 feels on the small side IMHO. But the 'features' in MM2 look to be the same as MM1...just a more expensive refresh.