I was on Atkins from 2000 til 2001. I lost 34lbs. Then I switched to the Zone and back to Atkins several times and gained back 15 lbs. On the Zone I felt good, but never lost weight and because you eat the max carbs for your LBM, if you cheat, you go over and gain weight.

Now, I've been on Atkins for 4 weeks. I'm on OWL and feeling good. Lost 9lbs so far.