Reverse Total Shoulder Replacement - Healing and Physical Therapy

has anybody had a rotator cuff so torn that they had to have reverse total shoulder replacement? I'm having that a week from Tuesday and I'm kind of scared. I want to know how the healing went and the physical therapy and are you out of pain for the most part because I can't even lay flat to sleep I'm having to sit up to sleep because it's so bad and the pain so awful. My left one is also torn. I'm having the right one fixed first