Aesthetically the mouse is great, very beautiful, especially for the time it came out.
The design of the mouse is amazing in several ways, but very lacking in others, specifically ergonomics and charging. In fact, had they made the mouse larger, in all dimensions, they could have solved two birds with one stone. The mouse is too small to comfortable use for most people, making it larger would fit the human hand better and decrease the amount of contortion your hand has to do to use it. And with this extra height they could have put a charging port on the front! Win win on the design side of things!
There are several products you can buy that help with this, I have both wings and a palm bump added to my magic mouse that makes it much more comfortable. I tried to take one apart once to explore making a new case for it that addresses some of these concerns, but I ended up breaking it.
I think that final bit really is the crux, the scrolling and gesture support is so good I'm sufficiently motivated to try and solve the problems with the mouse. A beautifully flawed product.