I've done both WW and BFL...and I'll be honest and tell you that while both have their positives and negatives, I find that the Abs Diet plan is much easier to follow than both, and has provided me with consistently positive results.
BFL was too rigid on when to workout and what to do for each workout, etc. I also found that I couldn't eat all that they said I should. I also didn't like that Myoplex contains aspartame.
WW brought me success, but it didn't last. Again, in hindsight (and after having been on the Abs Diet), I think that WW has a good plan, but the plan isn't "life long". I can see the Abs Diet plan being a life-long plan that I can stay on.
I've lost about 8-10 pounds since starting the Abs Diet about a month and a half ago. What's ironic is that in the beginning, all I did was change the way I snacked and I still lost about a pound or more a week. I find that I'm no longer hungry like I was before, and I have so much more energy during my workouts. It's been amazing.