I would totally suggest that the next time you do the prep ask if you can do the one where you take pills and drink them down with water. Im sorry I forget their name(someone mentioned visicol??) but if you don't ask they'll probably just have you do the prep where you drink that nasty gallon of Go Litely or whatever it's called. Why they call it Go Litely is a mystery since it's anything but light.
I've had a number of scopes done and the first couple or so I drank the big gallon of nastiness not knowing there was a much better alternative. Once I found out there was I was like HELLO!!! why would anyone suggest the gallon of liquid over the pills???