Believe what you want, I guess.

Both my current and previous company got in Soylent on occasion; the current one has gotten Coffiest a few times, which I haven't tried, while the earlier one got in the bottled Soylent and the short-lived Soylent Bar. I tried the bottled version once--maybe twice?--and had no ill effects, but didn't particularly like it, either. I had no ill effects from the bar, either, and I confess I actually rather liked it. I'd probably order it again, assuming it seemed safe.

But as someone who, well, actually likes eating, I don't see the attraction of using this stuff as anything other than "I don't have enough time to cook or even go to a sit-down restaurant" type meals, the same way I would any other breakfast bar or meal drink. And looking at it that way makes their meal drinks much less appealing to me compared to, say, Ensure. Yes, Ensure has way more sugar, but it has a half-dozen fairly reasonable flavors, none of which are "dilute pancake batter."