(Looking at the book):
A 37 yr. old male, 5'10" tall, who weighs 200 lbs and is fairly inactive would get 33 points/day. Plus an additional 35 points on a weekly basis.
Most veggies are zero points; a 3oz beef portion is 5 pts; a large bagel is 6pts, a cup of rice 4pts, small potato 3pts. When you add fiber foods, such as beans or whole grain items, the fiber reduces your points for a given item.
You get in trouble when you start doing combination foods, like chicken parmigiana, 5oz, with sauce, 10 points. Add some garlic bread, 1 slice, another 5 points, and the 2 Tbsp. of dressing on your zero point salad greens will cost you 4 points.
when you join, you are given LOTS of information on food point values, and you can buy others, such as fast food restaurant data. Also you are given a slider calculator where you enter the calories, match it up with the fiber and the fat grams to get the points.
There are also 'good health guidelines' such as eating 5 servings of fruits and veggies/day; choosing whole grain; 2 servings of dairy/day; water; healthy oils, and adequate protein.
It's really a very healthy plan.
The above is called the "flex" plan; there is also a "core" plan in which you don't count points, eat till you're full of certain foods which are mostly fruits, veggies, lean protiens, legumes, beans, etc.