Keyboard in the 7520 seems pretty solid. An improvement over current generation Apple keyboards and... solid feeling. I wonder how different 7510 is over the o

Keyboard in the 7520 seems pretty solid. An improvement over current generation Apple keyboards and... solid feeling. I wonder how different 7510 is over the others. This one is not my beloved mechanical keyboards, but it does not fatigue my hands at all, and has a full numpad :)