My sisters swore by their surgeries and they had both replaced. I had problems with mine...but it was better. I had to be in the backseat of a car for two days in a row, and when I got home, that knee swelled up. I went to the doctor and she said that nothing is wrong with the implant. Somehow, I hurt it by sitting crunched up on that trip. It seems to be getting better but its been two months.. ouch! I don't know what to tell you. I am a bad patient and I had a different surgery than my sisters. they loved theirs.