I have had both knees hurting for years, everyday. While I was researching a different product I found a site that reviewed and rated similar products and rated Flexoplex the best. After reading all of the reviews, I thought I would give this a shot. I was doubtful as I have had the knee pain for so long but in the 3rd week 99% of the pain in both knees is gone! The instructions said it could take 30 days to see results and I saw them in 3 weeks. Since it has kicked in, I have have no pain and I can't tell you how happy I am. I have already told friends about it. So yes, I am 100% satisfied.