I have been putting off having a colonoscopy because of some horror stories I had been told. Well if I had talked to Dr. Rettig first I would have had it done years ago. She told me I wouldn't remember a thing (that is true), it really was a piece off cake. Ok the prep work isn't all that fun, but (no pun intended) it wasn't real bad, just have something to read in the bathroom and you'll be fine. As for the procedure itself, nothing to it, Dr. Rettig and her staff made me very relaxed and at ease.
I would highly recommend them!