L.P.
I haven't tried Alli, but I did find a product that is a great help to WW. It is called Sensa. I don't sell it, but I have been using it and writing reviews on it for 6 months.
It is a product that doesn't change your metabolism or anything. It is made of ingredients you are already eating, but the combination sprinkled on top of your food tricks your sense of smell and you get full faster.
I can NOT eat as much as I used to and I rarely feel hungry. I lost 19LBs doing Sensa alone, no diet, no exercise, no additional water. They say the average results are 30lbs, but I'm sure that is with people doing the exercise and recommended water eating, plus they recommend eating breakfast.
Sensa would make it easy to stick to a point system. And it takes away most people's desire for sweets! I don't even WANT cheesecake or chocolate anymore.
You can read my journey at qtpies7.com, the links are on the top of the right hand column. It costs about $33 a month, and I have a code posted for a discount.