Based on discussions I've had with people about soylent, this seems about right. It's a really, really appealing idea to someone like me who often thinks of food as a problem to solve rather than an enjoyment, but it appears that a lot of people enjoy food more frequently than I do. It also sounds like there's not much additional benefit to consuming soylent exclusively, so the optimal way to eat it would probably be some mix of soylent and your favorite foods.