Meh. It was OK until the final act. The kids were the best part and the making of their film was fun. The girl especially was fantastic.
But the evil/incompetent military was beyond cliche and dumb. The alien was so stupid looking and such obvious SOD-breaking CGI. We should never have seen what it looked like. It shouid have hidden in the lens flares.
Then to ask me to sympathize with this indestructible ILM reject that slaughters "badguys" and innocents alike (the latter for lunch) and cheer as it heads for home while the dad who's been a dick the whole movie finally hugs his son ... movie ending FAIL. Hey, Mom, this really personal possession of yours? That was salvaged from your broken corpse. Yeah, I'm going to let it be taken by the alien that just destroyed the town and murdered half a dozen townspeople and who knows how many soldiers and airmen. Because it's cathartic. I guess. I don't know. Just go with it. Pretend this is as good as ET.
*Sigh* How could those children not be horrified by the alien EATING PEOPLE?
The simple fact of victimization does not make the victim good or inherently sympathetic. The alien got treated like shit, sure, but its reaction was to murder and eat people. It says it only wants to leave through a mind meld so, I guess that's it, it's telling the truth? It wasn't an advanced scout for an invasion or looking for a light human snack on the way home? It's OK that it murdered townspeople or that the train conductor was murdered by a terrorist (the science teacher) during the train derailment which set it free?