Yes, I've lost over 50 lbs. on WW (was 82 lbs. working towards 100 lbs. total, but I had a slip and am on track again), and so has at least one other person here. In fact, I started at one pound more than you did!
What keeps me on track are WW meetings, journaling, and posting here, especially the monthly challenge. My main goal in life is to beat Jillegal.
Okay, back to being serious, what's worked for me with exercise is making it a habit. I get up and go to the gym every morning except Sunday. Four days a week I do deep water aerobics and two days a week I do a circuit training in the weight room followed by 1/2 hour of additional weight training. I also try to walk every day, and having a dog that needs his walks helps with that. The weight training stuff is really helpful for toning and shaping your body. I was able to fit into a sz. 12 in the 190s, and when I got to 179 (my lowest before my slip), I could wear a sz. 10 from two different stores, although it was tight. I credit the weight lifting for that.
I started doing the Core plan when it came out, and I like it because of the emphasis on whole foods. When I was doing Flex, I tended to hoard my points for processed goodies. But I lost most of the weight on Flex so I must have been doing something right. With Core I get a lot more calcium in, which is beneficial because I have osteopenia. I still journal with Core, but I don't track points.
Regarding motivation, being healthy as I age is my main motivator, although getting out of plus sizes was a big thrill. I love shopping at thrift and consignment stores, which is something I never did before I wore a sz. 12. I'd joined WW what seemed like 100s of times, and it was only this last time that it really "took." I'm like the tortoise, though--very s-l-o-w, but I know I'll make it because I'm persistent.
Hope this helps!