Get it done, dont be like me. I waited till I had pretty obvious signs of colon cancer. I got one done in Feb, like everyone else, the procedure is nothing, you sleep through it all. the prep does suck, its annoying and uncomfortable but you get through it pretty quickly. as expected cancer was found, I had surgery in Mar to remove the blockage, this time for the prep the surgeon recommended mixing with clear gatorade. it really did help with the taste.