A lot of you guys saying it isn't the best way, etc, aren't thinking about the guys that don't have a lot of fat to lose. If some fat-ass is using dehydration to lose 15 lbs overnight while carrying 25 lbs of fat, then yeah, its just stupid. But a guy that is already lean doesn't have another 15 lbs to lose. Then dehydrating isn't only the best way, its the only way. As long as you put all the weight back on, it doesn't hurt your performance.