While it is true that this film's plot is a clichéd, father-doesn't-know-son-well, father-saves-son-at-end based story, and it is also true that, like with all war films to date, the film is audaciously biased towards America's power over the rest of the world, the film does make a genuine point about humanities dependance and complacency when it comes to global warming, and for that it deserves a star. The other stars go to the amazing special effects which are, quite simply, the best ever seen in cinema history. You'd be hard-pressed to find anything that even comes close.
My verdict is that this film, despite having a flat plot and amateur-ish acting (apart from Dennis Quaid, who proves once again that he can give even the most emotionless parts a bit of soul), you're certainly not going to be bored watching this.