That's my PoV too. Soylent sounded interesting in concept and then I saw the combination of the creator advertising it as a replacement for all your meals, while quietly noting that he hasn't actually used it to replace all his meals? Just feels kinda shady, and makes me concerned for the people who are gullible enough to actually try subsisting on it. I hope it doesn't injure anyone.

In a general sense, meal replacements are great - they let you simplify eating and save money by buying in bulk, and the regulated intake can help if you're trying to lose weight, too. But you better believe the friends of mine who try to lose weight using a completely replacement-based diet are being supervised by a doctor!