Not having the ability to use a pee valve or relief zipper and having dove both back entry and front zip drysuits, I do appreciate the front zip suit. Although I have used a variety of methods to get out of a back entry suit by myself (including using the handle of a tank secured on a boat while sitting on the bottom of the boat and scooting around to unzip it in an emergency), I still prefer being able to unzip the suit by myself wherever/whenever and found the front zip easiest to use.