First the obvious – you’ll eat less.  You’ll lose weight most likely just because of the difference in daily calories.   It’s very tough to cram 2200 Calories into one dinner meal and it doesn’t feel good to do so even if you can.   So there’s that. It’s cheap, you’ll save money – you’ll save time as you’re not thinking about nor preparing 3 to 6 meals a day.   It’s simple.