@saeternes: regarding wedge or pillows - I used pillows, putting them between the knees when laying on my side. I was warned not to use a pillow under the knee when sleeping on your back, since that will delay the progress of getting the knee extension. As far as recovery after surgery is concerned, everyone is different. For me the most excruciating part was working on leg extension. 3 to 4 times a day I had to rest my extended leg on an elevated surface (I used the sofa arm rest), and simply keep it steady and as straight as possible for 20 minutes each time. Even with an ice bag on top, and distracting myself with glorious music recordings, I came close to tears every time because of the pain. Other people had no issues, from comments I read in the past.
Good luck, get as prepared as you can, listen to your therapists, and be patient!