I've done Nutrisystem, and the average calories per day for women is 1200. They have you add in your own dairy, protien, fruits, and veggies.
The food is okay- it took a few months, but I narrowed down the foods that I like- which is most of the Italian stuff. Some of it is actually GOOD.
Does it work? Well, it's helped me lose about 25 lbs, but I wanted to lose at least 50. I think it works best for people who severely overeat and who do not exercise. For the past year and 7 months, I've been working out between 7-12 times per week- working out on my lunch break, and then doing martial arts in the evenings. My weight loss on NS was a LOT slower than most. It's good because it gives you a set meal portion (minus the add in's- which they are pretty clear about what you should/should not have). It is sort of hard to stick with- the food gets a little boring- and it's hard if you are in social situations. But to lose less than 10 lbs, it might be worth it. Let me know if you have any specific questions!