The first time I heard about Let's Dish, I honestly had to have the concept explained about 4 times before I understood what the deal was and why on earth one would want to do this. It seems to me that the real value here is for people who don't like to grocery shop and who need to work from a recipe in order to assemble a meal. If you are an intuitive cook and can create a quick meal from pantry staples and refrigerator dregs, you will probably not find this service useful.
I have eaten a few of the Let's Dish meals with some family members, and all I have to say is, "Meh". One dish was some sort of chili-marinated steak, and another was a sort of asian-y shrimp dish. The sauces seem kind of heavy-handed and salty, and frankly assembly and cooking of the dishes takes about as long as making some sort of quick pasta dish or grilled steak/chicken/fish + steamed/nuked veggie + steamed/nuked rice or potato. It's not for me, but I can understand why some love it.