I loooove weight watchers. I've been trying to "diet" since August 2011. I also got a personal trainer at that time. I was eating all healthy foods.
I started WW two weeks ago, and noticed with counting points. I'm actually eating more! I was eating far too little and my workouts were clearly not effective.
Now I have more energy and longer workouts. And it's paid off with 10 pounds lost in 14 days! 
I seriously feel if I can do it anyone can!