Huel just came to the US. I haven't tried Soylent, but I have to say I really love Huel. Keeps me full, no stomach issues, the vanilla just tastes like lightly sweetened oatmeal.
Plus it's vegan, gluten-free, non-gmo, low fodmap, etc etc. You'd have to try REALLY hard to find a stomach condition that wouldn't allow Huel.
I have a bag of Huel in my kitchen gathering dust because I just couldn't get past the consistency of it(the little chunks of oats or whatever). Also the name reminds me of "Human Gruel" meanwhile everyone I say it to immediately thinks "Human Fuel", which I think is amusing. I guess my brain burned the connection to those two words after trying the stuff for a couple weeks!
I actually don't mind the chunks, but I am probably the least picky eater I know. That said, I have gotten to the point where I can mix it to a fairly uniform consistency (just shaking a lot and doing the right ratios of liquid to powder) so maybe it just takes practice.
I think the chunks definitely help with being able to feel very full after drinking it. Maybe I'm just not letting it mix/soften well enough before going for it. I'll do more experimenting!
Plus it's vegan, gluten-free, non-gmo, low fodmap, etc etc. You'd have to try REALLY hard to find a stomach condition that wouldn't allow Huel.