You can read about my recent 40 day fast on the weight loss forum for more detail.
I went 31 water, 3 on juice,2 on water and last 4 on juice.
No prefast just cold turkey. My prefast diet was not great. I was food addict.Overate pretty bad and not too picky about what I ate.
Definitely more energy on juice.My refeed was also pretty unconventional in that had some meat in various forms from pretty much first day and it didn't seem to give me any problems.But I don't believe in vegetarism ,believe man is natural omnivore.