Wannabe, you do address the issues with LL, the weekly counselling is designed for this, and on the 12 week reintroduction you are gradually including real foods and learning what your triggers are, so you are weaning yourself away from packs.
I was 3 1/2 stone overweight, with a BMI of 32, and have a lot shorter journey than some. I was clinically obese, and depsite having tried WW and diet and exercise could not shift it. Half way through I have a BMI of 27 and am now 'overweight' and I have lost 1 stone 10lb. Like I said before you have to want to change the way you deal with food, if you want to stay lighter, you have to be strong enough to maintain and not let yourself slip back into being heavy.
I dont think that 90% is an accurate figure by the way!