Have used on multiple joints damaged from recurring RA flares and MCTD,tendinosis,calcific tendinosis,tenosynovitis basically everything connective tissue related my shoulders,knees,wrists and hands feel better than they have in the past 5 years I am truly amazed how well this little beauty works,just amazed,if it broke today after owning for less than a month I would not hesitate for a second to repurchase.The first 3 times were a little painful and I could literally feel "knots" "nodules" melting away just finished my 4th session and the tool moved painlessly over areas that used to be a lot "lumpier" and painful my only regret is not knowing about SWT and not buying sooner.