Let me start by saying that I purchased the "Natural Unsweetened" flavor of this powder, since Amazon seems to lump all the reviews together. People who are complaining about aftertaste from stevia or erythritol probably didn't order this one because it doesn't contain those (though it does list "natural flavors" as a ingredient). I figure if I want to flavor it, I can do so myself, but I actually find it quite tolerable as is--per the directions, I mix it with either almond milk or water (or usually a mix of the two with mostly water), and it's fine--not award-winning taste, but I wouldn't expect that from something that is not sweetened and minimally flavored.
I normally use whey protein but wanted to try something else for when I didn't want quick-digesting protein, and I wanted to vary my sources by not consuming so much dairy while also avoiding soy. I thought about mixing pea and rice protein powders myself (to get a better amino acid profile than either alone), but then I found this, which mixes them plus a bit more, and it's just what I was looking for!
It's more expensive than whey, not quite as versatile, and has a different taste and texture (almost chalky but not disgusting--and, hey, it contains fiber), but it's about what I expected for a vegetable-based protein powder and it's certainly not bad. I will keep this in my rotation as something I use when I want extra protein but don't want to go for whey.