I liked the underwhelming aspect of the powers. It's not a great power/great responsibility cliche, but more of a some power/high cost kind of thing. Makes it seem more possible in the real world, easier to relate to them as characters, rather than being the kind of superhero that you might dream about being.
I liked the tease toward the end about the group not necessarily being the good guys, too, without them knowing it.
Actually thought the premiere was better than any ep of Falling Skies so far, but that's just a matter of taste.