Yes I did see it, release day no less. My opinion is that its a "total rental". The big screen didn't help the corny aliens who as one reviewer put it "could've been designed by Sanford and Son". Like I said, it was a least taking a positive view of the soliders with minor multiculturalism PC baloney and war movie cliches.
I walked out of the theater with a big shrug. Its not horrible but I don't have much interest in ever seeing it again. What little of Ebert's review I read on it was funny simply because it shows how idiotic he is, as he gushed over Jolie's action chick flick Salt last year.