"Soylent is betting on the fact that consumers want to separate the nourishment of food from the ritual of eating. That's a bit like saying, 'We can offer you the ability to reproduce without the inconvenience of having sex.'"

This is the best criticism of soylent; what they're doing just goes against the grain of how peoples' minds are wired.

Maybe it'll wind up gaining traction as a fad instead, like the meal replacement product on House of Lies[1] this past season[2].

[1] http://www.youtube.com/watch?v=qLPhbw0IBk8

[2] When I saw that episode, I wondered if it was meant as a deliberate spoof of soylent.