It took me two short days to adjust to nearly 100% Soylent with 1.4. After that I had no significant gas issues, and found a single serving kept me feeling full for 4-6 hours. Three servings a day was all I needed.
Then came 1.5. Even after a week, I still had bad gas and constant borderline diarrhea. A serving of 1.5 would also leave me feeling hungry again after just an hour or two. Finally I had to quit Soylent.
Here’s hoping that 1.6 comes out soon and is more easily digested.