I went in for a colonoscopy. I followed the prep directions exactly. I had water before arriving. NOWHERE in the directions, from the hospital and on the medication did it state not to drink water 2 hours prior. The only mention of it was if I had to take medication to sip it with water. So, when I arrived, I was told to wait an hour. That hour turned into 2. While waiting in a gown and with a painful IV in my second hand (they tried on my first hand with no luck) my curtain was left open, even after I shut it (big lack of respect/privacy). The Dr. came to see me and tell me there would be a wait, which I respected and I understand the reason for it. My nurse was VERY understanding and communicated well. However after being moved back longer than I was told and being there for 3.5-4 hours, I had to ask someone to take out my IV and leave since my ride had her own appointment. Then, I was almost forced to go in a wheelchair and be pushed outside where my ride was not at, despite not having any procedure. At that point I had zero patience. My nurse came and explained so I could walk myself out. Everyone was polite except another nurse who rolled her eyes at me. I was beyond frustrated to the point of crying and I couldn't get out of there fast enough. So besides, the rude nurse at the nurses station, I was treated well by both the Dr. and nurse. However, it was a huge waste of time and money when not given proper instructions. Time off of work, time prepping, my driver's time, hours wasted waiting and leaving without ever having the procedure. So, overall a horrible experience. Fix the instructions. Now, I will have to do it all over again. 
CND GI