IIRC studies have generally shown that elemental and polymeric formulas are similarly effective, but I agree that Soylent has some strange stuff that prolly wouldn't agree with me.

I had a good experience with Ensure Plus (chocolate) which was used in a clinical trial or two in Australia (or maybe New Zealand). But I used the one without fiber whereas the one with fiber bothered me.

Ensure has been a godsend for me too particularly during Ramadan. lol. A great way to get some wholesome calories when needed.