I just got back from seeing it.
Not bad at all. Nice characterization, solid storyline, and, from what I could tell, reasonable tactics from both sides of the battle. I'm also glad that they pointed out the battles were taking place all over the world, but the writer merely focused on the action in LA.
"What has been done has been done and cannot be undone."--Ruth, All the Weyrs of Pern
"Dragons can't change who they are, and who would want them to? Dragons are powerful, amazing creatures."--Hiccup, Dragons: Riders of Berk