Yes I am using the weight watchers program, but tracking in ITRACKBITES because it is free. As others have said, you can type in a food name or just scan the barcode and get the points. Chicken, turkey, fish, fruits vegetables are all zero points (you can search zero point foods for the complete list). There is a "secret" formula that takes all of the factors (fat, fiber, calories, etc.) to arrive at the point total.
For me it makes it obvious how bad some supposedly good foods really are for you and this is an easy way for me to understand the quality of food I am eating.
As an example, today I ate 5 oz of grilled chicken and 8 oz of black beans for lunch. That is zero points and 350 calories and good for both of our methods. However, I could have had a 2 oz Snickers Bar instead which is only 280 calories but it would cost me 13 points. If I were only counting calories I could say the Snickers was the better choice.
Naysayers (which used to be me) will say if you eat 10 pounds of chicken and 38 bananas every day you won't lose weight and that is probably true. I think realistically though, you couldn't eat that much and even if you could it is better than 4 bags of potato chips and a gallon of ice cream.