I've tried the near-zero-carb thing and experienced massive lathergy. I may have needed to increases fats more or something but I barely managed a week before I stopped the diet, mostly nagged into doing that by my wife. I've since had more success on less extreme diets.
But if you're actually trying to get into contest shape you would most likely eventually need to go with the more extreme options. It depends how much fat you have to lose, how much you've already lost, how low you want BF% to get etc, but if you're in the early stages there are other things you can do before putting yourself into ketosis.