when I first saw it I thought "yuk" but I had one yesterday and it was pretty good- only thing I would change next time is I would get hot taco sauce to put on it, wasn't very spicy.
It's my understanding that there is no ground beef inside like a regular taco. Just the lettuce, cheese, tomato, and some kind of sauce with a chicken patty "shell". So basically just a chicken burger without the bun.
KFC had something like his called the "Double-Down" with all the cheese, lettuce and sauce in between 2 chicken breasts. DS loved them but they were disgustingly messy to eat.