I had both mine replaced last year. Should have done it sooner!
It has allowed me to start riding again as I can get my leg over the seat. I'm 6'3" and used to be 245. I'm down to 212, thanks to the bike.
You will have so much of your life back in your control. I took a hard fall last weekend, stitches in the knee, air splint on the ankle, but the hips are still like new.
You won't remember the pain, get over it. Get a good physical therapist and be honest in exercise and diet. You have a lot of living in front of you.