'Musical', BoXXi?....could be, could be.....who's to say?....
[OK, so I fauxed my pas]....
Wise....it's optical, so there's no moving parts to worry about getting fluffy and dirty...it has an accuracy higher than the pixel count of the typical hi-res monitor, a 'solid', 'quality' feel to the buttons, and including a 'clickable' scroll wheel makes 5....and a shape that at first 'seems' over-large, but becomes 'naturally ergonomic' and 'right' with use...
OK, Mister Gates...I done the promo, now you send the cash...