I had to give 1 * but the appointment never happened as the place doesn't exist. Apparently they moved but nobody knows where and no way to get hold of anybody. My advice .. AVOID!
I booked and prepaid on Treatwell - travelled all the way to find out it has closed or moved! I spent 30minutes running around wimbledon trying to find it without luck and tried to call nonstop without any answer until I eventually gave up! No notice to say where it has moved or that it has closed down. Extremely disappointed