This does look pretty awesome. And I must be the only one who wasn't bothered by the slo-mo. For one thing, it really makes the trailer stand out; and plus most of the slo-mo scenes were so damn cool they DESERVED to be slowed down.
I have to admit it IS a bit strange to see these characters suddenly jumping and gliding around like superheroes though. My impression from the comic was always that these were just normal people with a little bit of training who basically moved around like you and me. In fact for most of the comic all they do is stand around and talk
What Snyder's done with it definitely LOOKS cool as hell, it's just a lot more stylized and "superhero-y" than I always imagined it.