Review Content Super nice! I carry a lot of stress in my shoulders and neck, and this product has been a god send. Not for someone with osteoporosis I have rheumatoid arthritis of fingers, hands, wrists & shoulders, as well as osteoporosis. I thought this product would give gentle vibrations to ease pain. It weighs 5.5 lbs and is difficult for painful finger and wrist joints to lift and place across shoulders. The percussions of the ball bearings are painful when they hit bone. This product is made for people with healthy, developed muscles and joints. Please note that Sharper Image will not allow return of this item for any reason. UNCOMFORTABLE Yeah it vibrates, but is uncomfortable around my neck. Great stress reliever I use mine every night after work. I do data entry so it really works out the kinks in my shoulders after a long day. Love it! Too intense...or it was broken. This one did not work properly...it was very intense hammering and no difference in settings. Also it has a power cord instead of batteries so you have to stay in one place. Big and heavy.