I hate to butt in, but:
Just saw the film. It was an okay film. John Cusack was brilliant, as always, and the special effects were gorgeous. The writing of the film was about what can expect for a disaster film. Not brilliant, but it was fitting.
Overall, the film was fun and it didn't waste time getting to the point. There were a couple of annoying characters. One played by Woody Allen (whose always annoying, but that's beside the point), but he gets killed by having a whole city dropped on him, so who cares. The other was some Russian guy, but he shuts up when the mirk hits the fan.
If you like disaster films, this is for you. If not, its not.