"it doesn't sound like it's being developed by people who know what they are doing" and "I bet it would be as effective as Soylent" don't fit well together, you're being hypocritical.
Not really because I mentioned "as a food replacement for a few months.", people have reported that Soylent worked for them for some period of time (weeks or months as I understand). All I am saying is that other products that exist may have the same effect. But Soylent isn't marketed as a short term meal replacement, it's marketed for long term use which I assume means years. You can survive on quite a few things for a short period of time, doesn't mean the product is good for you.