It will be 3 years the end of this March that I had bi-lateral knee replacements done by Dr. Sharkey! A year after my operation I went to Hawaii (a 50th b-day present from my children) and was able to hike 2 miles up a mountain and then 2 miles down. I can kneel and I exercise 3 to 4 times a week at a gym along with 3 mile walks! The best, best thing I ever did!!! He gave me my quality of life back and now my physical activity is endless!! Dr. Sharkey is the BEST!!!