Had bilateral knee replacement done Aug. 2010, was back to work 9 grueling weeks later and back on a snowmobile in Dec 2010.. I concentrated on PT every day during the 9 weeks, ended up with 110 degrees, even went snow skiing at Christmas, never feel so many times in my life of skiing til that week, my feet were not where they had been for 52 years, but i kept going at everything and kept improving, i only ski a couple times a year and nothing like i did years before, now i just look at the slope, smile, remember the good old days and glide down the groomed run.. On the snowmobile i don’t do the dance from side to side like before, but i use my body english to accomplish all my needs and moves, my only problem is deep powder when i get off to stomp or help someone, can’t lift my feet high enough to walk or stomp the hip deep powder like before...In all and all 30 years of some memorable skiing and as many years riding, 17 yrs as a professional snowmobile guide that were very memorable, i would get it all done again, to lose some motion, maybe a step or 2 lost as well, but I also lost that debilitating, almost unbearable pain in both knees, the kind of bone on bone pain that no combination of alcohol and pain killers could never relieve..Now occasionally my left knee will give me a pain, but i just smile and remember the real pain, and this will disappear in a bit and it is nothing like 10+ years ago.. all is good now, my married life is way better, my attitude is way better.. i found that a positive attitude before the surgery and all the way thru Physical Therapy helped the recovery immensely. hope this rambling helps someone make the right decision..