FWIW, Erithritol doesn't taste like sugar to me, and tends to give me a headache. I've found that any of those "sugar alcohols" are really unpleasant for me. Not sure if this experience is shared by others, but I thought I would add my anecdote.
Yes, it is known that erythritol doesn't feel great to everybody but my experience with it was awesome - I ended up eating huge amounts of it with a tablespoon (resulting in no no unpleasant sensations) in bare form and baking meringues :-) But I've stopped buying it as it's a little bit expensive and supposedly has little health value, lactulose is a way better (but you can get kind of mild diarrhea if you consume too much of it as it has laxative properties).
