Well, I'm really doing it to try and de-tox. I have been really trying to eat better for the last 6 months or so, and it felt like doing this would give me a good boost. From what I hear, after you finish a fast like this your taste buds are more sensitive... and things that tasted good before (that big-mac) don't taste so good anymore. One nice side-effect is that you will naturally lose a few pounds doing it.
So I just had water all day yesterday. I was fine all day - had about 80 oz of water total. I got to feeling headachey and yucky around 7 or 8pm. I went to bed around 9 just to speed the process. I must say that I got up around 5am this morning feeling really good. I'm just eating fruit today... so I'll see how that goes! I'm dog-sitting a boxer and a lab (along with Sammy) today and have been able to walk them several times and not feel out of energy at all!