I bought this item with great expectations and hopefulness for any kind of help for my arthritic knees. I didn't get any results really, for the first couple of weeks (as I have severe bone on bone condition) but kept using it faithfully 2-3 times a day. by the third and fourth week I've really started to see a difference...so good job tendlite you made a believer of me!! I might also mention that I'm using it on my ACL and have actually seen results there too...TIPS: USE IT MINIMUM OF 2-3 TIMES EVERYDAY, 1-3 SESSIONS ON EACH JOINT FOR RESULTS