Good luck to you Sand! My MIL has had both replaced in the past 5 years and she has done really well after both. Recovery time total was about 6 weeks for her. She is a woman in her early 50's and she was upset that she had to have it done but it really has been a blessing since she had such a hard time walking before they were replaced. I know things will go just fine and we will miss you while you are gone!