Saw this today and have one thing to say:
HOLY S**T!!!!!!!
HOLY S**T!!!!!!!
I was expecting all action and no story. But several of the characters had secrets/motivations/loyalties that revealed themselves at different points, altering the course of the plot in unexpected ways. So I would not characterize this as a movie with no story. It has a very basic concept (Die Hard in a high rise--oh, wait a minute...) with a modest amount of character development driving the action forward.