I have, twice. I had very good results. I lost weight both times (more the first time, as I had an older baby, was more active, etc. than right now with a younger babe), found my sugar cravings disappeared while eating that way, my moods became very stable, my energy improved a lot.
I have been able to pretty much stick to eating this way; I am generally eating a very low grain, low sugar diet. It isn't hard, once you get past the initial week or so. You sort of get into a groove, and your body begins to lose the craving for sweets and grains. Give it a shot! There are so many good things to eat that you won't miss the stuff that isn't allowed.