I compare only with these two firms, because I have not tried Ost. The taste of watermelon is sweet and sour. I take 2 spoons with water before and after training. The powder is very fine, instantly dissolves! The taste of watermelon is certainly chemical, but unobtrusive and vomitive reflex does not cause. By effect, all 3 firms give the same result. These BCAA are the most expensive of the 3, but the most pleasant :)