Had one about 18 months ago, one of the best things I ever did for myself. I was starting to get bone spurs in my neck and upper back so my health insurance paid for it. They took off 5 lbs total, and it looked instantly like I had lost 25 lbs. It is so wonderful to both look “normal” (instead OMG look at her chest), and not having the girls swinging so low. 
It took me about 3 months before riding faster than a walk was comfortable, but it was more about finding a comfortable athletic bra than the bouncing itself. You will have to sleep on your back for awhile. I would recommend it to anyone who is need of one, just make sure you have an excellent surgeon and check him out.
You will have obvious scarring, but as long as you aren’t a topless dancer, I think you’ll find out it’s all worth it. Good luck!!