a little bit of both. Laxative 3 days out, 64oz of miralax plus laxatives the night before and a liquid diet the day before. Just a routine every-ten-year screen, but still better than discovering stage-4 colon cancer. 
I forget the name of the pills I got - something like Sutab, maybe? did that instead of the traditional gallon of stuff. Not on all the formularies for insurance, but with coupons, the doc convinced me to try it. Toughest thing was having to get up at about 3 to start the day-of round of pills because I had an 8 AM appointment.
