I bet they do a good job. But a chicken sandwich is about the bottom of the barrel, meatwise.

How about a really good pastrami? Or a Philly? Gotta have tender beef, ribeye preferably, marinated and rubbed and smoked and braised or steamed, then grilled with peppers and onions. Does the fake stuff stand up to that? No? Then its got a long, long way to go before it replaces anything.