Amethyste, I've been on Weight Watchers for about a month now and I love it. I've been loosing weight steadily, but not too fast. I was soooooooo hungry the first two or three days, but then it passed. I guess my body got used to fewer calories.
Did your friend tell you about the flex points? In addition to your 20 points each day, you get 35 flex points each week. You can use a few each day or a lot at one time. It's your choice. I usually try to save mine incase I eat out on the weekend or want a glass of wine with dinner.
I find going to the meetings really helpful too. They are a lot of fun, I have a great leader. I've gotten tons of tips on low point recipes, low point foods that can be bought at the local supermarkets, and stores that have great sales each week.
I know I'd never make it on South Beach. I love pasta, bread and cereal. I'd feel totally deprived on a low carb diet. With Weight Watchers you can eat anything you want, it's more about portion control.
Good luck with whichever program you choose!
ps. Let me know if you have any specific questions. I'm sure you'll get lots of advice, there are a bunch of us on WW here.