I have had 2 successful knee replacements and after each replacement I used a CPM machine to aid in my recovery. It was an absolute godsend for after doing my physical therapy or just being up and moving around. I knew I could get back into bed and get back into the CPM with an ice pack and it would take the swelling down and feel so much better just from the slight motion. I am now going for a knee revision and I will have a CPM machine waiting for me when I get home from the hospital. I highly recommend getting using one of these machines to aid in your recovery.