I tried both a Beyond and Impossible burgers in restaurants a couple or more years ago. They tasted...ok....but the flavor was like overly processed food. Not to be too indelicate, both were tough on my digestion also. So off my list they went.
I'm a carnivore, but I love a good portobello "burger" and will pick it over beef most times I see one on a menu. The best veggie burger I ever ate is Houston's/Hillstone version, but you're gonna pay upwards of $27-30 for it. And worth it.
I just don't think those Beyond/Impossible tasted good enough to draw the carnivores over to them.