Saw the movie, it's on hulu. Does the juice really make you feel that much better?

Bought a bike last summer, got down in the 320s and started counting calories May 1st of this year (weight watchers then swapped to the loseit! app on my phone). Hit 289 this morning. Plenty happy with current results averaging just under half a pound a day on a 2400 calorie a day budget, not hungry at all, usually under 2400, and realized how much I was actually overeating and how crappy a lot of the stuff I was eating is. But this thread has intrigued me enough I'm thinking of trying a 3 day, or maybe just as a supplement, to replace breakfast.