I got my wife the 636 for her first bike, put new dogbones on it lowering it 3 inch in the rear, also dropped the triple clamp in the front. Wife is only 5'2". Shes having a blast, every ride we go on shes a little more agressive and less unsure of herself. She likes it because its a bike that fits in with everyone elses. She didnt want one of the smaller bikes just to have it refered to as a girls bike hehe. With the 636 they cant say that since over half the people we ride with ride 600CC bikes.