I opted for the Visicol prep. I had read that it was a bit uncomfortable swallowing these HORSE pills. A large vitamin was all they were. No taste and only one glass of water with each 3-4 pills every 15 minutes. I do not think it could have been any easier. Never would I suggest that anyone drink anything when the pills are available. 20 pills at 5pm and then 20 at 10pm. The only tricky part was that they did not kick-in until 2:30AM! So did not sleep all that great but the cleansing was very very mild, no real cramping and no pain at all! Hell, I could do that twice a week if I had to.The part that needs tweaking because of this delay in the cleansing was that I was no way leaving the house at 7:30 AM for a 9:00 AM colonoscopy. (I was still cleansing at 7.00AM) So, if anyone is going to opt for the pills make sure you discuss with your doctor and adjust your timing.Another tweaking would be to ask if you can take an Imodium once you are passing only water. The active ingredient in Visicol will continue (not sure how long it actually stays in the body) to draw water into the large intestines even though your tract is empty. Taking the Imodium made it much easier getting to the doctorï¿½s office.As far as the actual procedure ... all I remember or felt was the IV prick ... counting back from 100 to 97 and then being woken-up! No pain, no soreness. Results of the test are great, just waiting for biopsy results.I was a bit nervous about the whole thing, but now feel like it could not have been better.