I've had 100%! Positive experience with Dr Shen and his team. I also had my surgery at Columbia with Dr. Kiran. Excellent experience all around.
Biofeedback was discussed for me, but I am doing well now and have deferred it. Biofeedback does not address the prolapse, but rather a "functional" issue with how muscles are firing in poor coordination so as to interfere with emptying. This is issue is diagnosed by ano-rectal mammography. It can occur along with prolapse, but they are addressed separately.
Good luck with Dr. Shen. Bring a list of questions. He will answer all of them!