We've been doing some variation of Atkins off and on for several years. Weight went down, then floated back up, then down, then up. Being consistent has (obviously) been an issue.
If you don't count binges or cheat days, we've probably averaged 20-30 net carbs per day for a long time. So in one sense PB seems like 'yet another diet plan' and yet it also feels like it may be the missing piece. I'm still reading the book, but I like what I've read so far, as well as what I've read here on the site.
Plus Mark reads Pharyngula. )