Thinking about grabbing one and a wireless keyboard just to free up USB ports on my Macbook Pro, how is everyone finding that mouse? Looks pretty slick but I'm wondering if the wireless Mighty Mouse might be a better option as far as responsiveness and comfort goes. New technology like the Magic Mouse makes me nervous at first, the solid trackball on the Mighty Mouse seems like it would be more stable/reliable but I do love how the trackpad works on the MacBook and the Magic Mouse seems to take after that...