i am doinf ww and it does work if you stick to hte plan. with ww all foods have a points value, such as a apple has half a point, a bag of maltesers have 3 and a half points, and you are allocated a set amount of points each day according to how much you weigh, how tall, kind of job you do, etc.
i started at just over 17 stone and was allowed 32 points. but a lighter person is allowed less.
the ww meetings are better than sw imo because the leader will talk about a topic and you can get hints and tips on weight loss, sw jsut goes round all the members and ask about their weight loss which didnt help me personally.
i personally have to go to a meeting to have the leader weigh me, if i dont go i find myself slipping back into my old habits as 'know one wil know if i eat this chocolate bar'
on ww you could feel hungry at times if you make poor choices of how to 'spend' your points, but the idea is to stretch the points ot be able to eat alot of food to not feel hungry.
if you join ww, they give you booklets and meal planners to plan what to eat and buy so you can get used to the points system.
i hope this helps you, i have lost 13 and a half pounds, it has took 3 months, it is slow but i have eaten alot and not deprived myself of anything. i could have eaten alot less and lost more buti would have gotten fed up and given up by now.
i still have a long way to go but am determined to lose 3 more stone before the end of the year