I have been working in physical therapy for 31 years. Don't believe the hype. We have 2 doctors at our Socal hospital who use this. One was a good surgeon before Rosa and the other sucks at knee replacements. The good one still performs good surgeries and the crappy doctor, crappy knee replacements with Rosa. Another ortho never uses Rosa and his knees are very good. And before greedbag administrators took away his choice of replacement prosthesis (too costly) he was phenom. Moral: chose your DOCTOR wisely!