I see it's been a while since you posted this, but thought I would chime in anyway. I too have pcos....I was diagnosed at 16 years old and am now 28. Weight Watchers DID work for me....I was able to loose 50 pounds....Just didn't have the willpower to keep it off!
It helped that I was living at home when I lost the weight (5 years after being diagnosed) and my mom was cooking my dinners for me
She'd tell me the night before how many points dinner was so I knew what I could do for lunch, breakfasts and snacks. Good luck with whatever you decide to try! Just know, it's not really as hard as the Dr.s make it sound to get the weight off with pcos!!! To me they made it sound impossible!