My mother-in-law gave me this recipe and she recommends using jumbo shells instead of using the manicotti shells because she thinks they're easier. I prefer the manicotti shells because I know it is easier to stuff manicotti than shells. You just have to know how to do it! This recipe originally came from "Taste of Home" and they recommend pre-cooking the pasta (whether you use shells or manicotti). I don't bother to pre-cook them, and this recipe cooks up wonderfully anyway! I like the fact that it doesn't call for cottage cheese or ricotta cheese as I don't always have them on hand, but I usually have some cream cheese!