I did a water / orange juice fast (orange juice was the only non-concentrate juice in this small town) and really enjoyed it. I had tons of energy and felt amazing. It was only 10 days but that was my choice to stop there because it was my first one and I felt pretty healthy already anyways being that I usually just eat healthy cereals and fruit / nuts.
I recently got a juicer and it is so awesome. I recommend if you have some extra cash (I wouldn't buy one cheaper than 100) then you should get one and try to get drink fresh juices for a fast, it's amazing.
Anyway, good luck!