Yes, Weight Watchers does work, but like everything else it takes commitment. I lost 45 pounds in 1996 and became a Lifetime member after a year of work. By attending meetings (for free since I was Lifetime) and staying aware of my eating habits I managed to keep it off for 7 years.
In 2003 I became pregnant and had to quit attending meetings. This was not a good thing for me cause I took an eating holiday, since I was "eating for two". I gained 60 pounds with my pregnancy. After my daughters birth I waited a year before going back to Weight Watchers. It has been a slow process, but I'm back to being 25 pounds away from my goal weight of 165.
I hope to be back to my starting weight within the next year. Honestly, it is a life style change not a diet. As I rebuild my better eating habits I have more energy and feel better about practically everything. The best piece of advice I can give you is to attend the meetings weekly and enlist your husbands help. At age 40 I'm having to work hard to loose weight and having my hubby's help is invaluable. Plus he is dropping the sympathy weight he gained when I was pregnant. The stinker has already dropped 10 pounds in the last two weeks (so not fair), but it helps keep me motivated.