Well it is now past the five month mark, and all going well. Some minor "clunking" when I first get up in the mornings, and minor pain descending stairs and getting up from low chair, but otherwise excellent.I can now do heaps more than before in my steep garden! I hope my journey has been encouraging to the "older" reciepents of knees! So glad I took the plunge, not that I had any other option, if I wished to remain active!