I saw an ad on television for one of those services recently .... I believe it was on CNN. I've never used this type of service, but in today's busy world with the need for convenience, I think this type of business can work.
There is a business in my area where you go in once a week and choose from a menu that has 14 dinner-type meal choices. From the menu, you choose 7 meals that come with corresponding recipe cards. From there, you go through the recipe card and down the line of ingredients where you assemble the meal ingredients into one large gallon bag or separate containers for each meal or however they do it. You pay according to which meals you chose and those meals are pre-sized for 4 servings, I believe.
I think this kind of service has its pros and cons - Pros: these are not prepackaged and boxed meals; all ingredients are fresh when you assemble the meal. Convenient for people who are always on the go and can't take the time to do meal prep at home. Cons: by midweek, some of the ingredients have been sitting in the fridge for a few days. I'm not sure how meat holds up by day 5 or 6? The other drawback is that it's definitely more expensive than doing meals the traditional way.