First off, congrats!
As far as "diets" are concered I think WW is one if not the best choices out there.
I am NOT a fan of low carb diets like atkins because they cut out a very important macronutrient which can lead to deficiencies. also, they are not a realistic diet for people to stay commited too and a weight rebound is usually soon to follow. And most people loose alot of energy while on low carbs, not to mention your motivation to exercise lol.
Now WW on the other hand has been based on 1 principal that most people struggle with (especially in the US): portion control.
using points to track your portions is a great idea.
also what most dont realize is that you can loose weight eating what you like by just watching your portions. there is no need to cut out anything as long as you burn more cals than you take in.
now throw in some resistance exercise and the lbs should melt off.