I have prepaid for some. If it's not awful I plan to try using it for the majority of my nutritional needs.
I like eating, but I don't like sourcing, preparing, cooking or cleaning up. I don't like eating in at restaurants either. I'm lazy and antisocial. So my intake is currently pretty bad, mostly take out or processed items. Soylent would definitely be an improvement for me nutritionally.
You may not be snarking, but a lot of people seem very upset that this product exists and that people are interested in it. I'm not sure why.