I just had a colonoscopy done 2 weeks ago. Two days before I started eating very lightly..like soup, eggs etc. Then the day before I could only have liquids and I did the prep at five in the afternoon. It was called Moviprep and it was great. You mix it up into a 1 liter jug which the pharmacy gives you with the prep. Drink it down every 15 minutes. Then the next morning I had to get up early and do it again.
By the 4th or 5th time going it was totally clear. It wasn't hard on my stomach and I had no cramps or anything with it. This was the easiest one I have ever done. The doc said they only use Moviprep now cause it works so well..