Hi tc, I had a colonoscopy 2 years ago, I won't tell you it was pain free as it wasn't but the pain was for literally seconds,they wanted to do another one this year and I said no,you can request a ct colonoscopy,the only difference with this is,if they see anything they can't take a biopsy,it is pain free though and I wouldn't be bothered if I had to get one again.just tell your dr,that's what you want or to be knocked out for a colonoscopy