I had prolapse surgery several years ago and it went very easily and worked well. I do not think I had either mesh or a sling. I also had a hysterectomy at the same time. (As a friend said at the time, I didn't need those parts anymore, and I don't miss them!) NOW however, I recently had cancer in my urethra, and most of my urethra was removed, leaving me incontinent. So now I am going to have an obstructing sling surgery using my own belly tissue to hopefully, change that. My doctor highly recommended/insisted on my own tissue so that my body would not reject it.
Best wishes to you for your surgery!