The only foods at the center are the bars and snacks (if you want them.) I cook everything or eat out or eat frozen food (duh -- not much else to do, right?
) Sorry to be kind of vague -- I don't know why it's such a secret. All I'll say is they really push the bars which are expensive. BUT I've bought them the whole time -- until recently. There are similar things in stores. Some people can't eat them for medical reasons and still do the program just fine. I like them because they give me a chocolate/sweet fix without cheating.
You don't pay if you miss a week -- you kind of just lose that week (as far as counseling sessions go). But if you've stayed on plan, you haven't lost anything but weight. If you go on vacation, etc., they can put you on hold so you don't have to buy extra weight loss weeks (especially if you've screwed up).