Anyone who has had Carticel done ........please advise!

Hi- I have bad knees and recently tore my meniscus (again). Had surgery and they trimmed it up. The took a cartilage biopsy and sent it off to Gynzime lab for possible Carticel procedure. I'm 38 years old and a Triathlete. Want to continue triathlons but I'm just not sure what to do at this point. I have read some "scary" things on Carticel (i.e.- LOTS of pain and not great results). I realize that recovery takes a lot of work and I am up for the challenge but I'm just not sure and have not found enough feedback as to ..........is this worth it?
Thanks,
Mike