It is undeniably hard due to the human anatomy. Multiply every tear shed about the high one-handed backhand by 10, and you will get it. The scapula, the elbow - everything gets in the way. If you have a chance NOT to hit it - do not, hit the forehand smash or even just the forehand.
I think it is harder than the half-volley, harder than the swinging volley, on par with the tweener.
Last edited by Netspirit; 10-13-2012 at 10:15 AM.