I think it's only really a hard problem because Apple has decided that they will only offer a single model (of most products). Apple makes one mouse. It's goin

I think it's only really a hard problem because Apple has decided that they will only offer a single model (of most products). Apple makes one mouse. It's going to fit 80% of people and they will like it. If you're one of the remaining 20%, go buy one from Logitech or Microsoft.