I was personally interested when it came out as I generally did not have the time to prep a proper lunch (even less so, back when I jogged in the mornings), and all the soggy sandwiches I haphazardly made were never really filling, but constantly made me gassy. Then I read all the reports about Soylent causing gassiness, which made it much less viable an option for myself. I don't know if all of the reformulations have fixed that, if it has then great.
The topic of Soylent popped back up in my head because of a relative who's been having trouble eating properly (partly time-constraint related, partly a loss of appetite for solid foods), experiencing fairly low blood pressure, etc. I've looked at other replacement beverages for her as well, including People Chow and the DIY stuff.