I wouldn't call it "bad" per se, but it wasn't particularly good.
Also, after all the bitching about how bad the accents were in "Planet Earth," well, I don't know whether Foster's was supposed to be French or not. The bottom line is that she only hit it about 50% of the time. maybe less.
Damon and the guy playing Spider were decent enough, and maybe whassername (the pseudo love interest). But even the half-crazy outback/scottish nemesis dude Damon was up against had a far more consistent accent than Foster.
It was kinda like District 9 Lite. It was better than your average B-rate scifi flick, but it's not really worth a repeat viewing and won't linger very long in the genre. I do like Blomkamp's kind of "TV news/documentary" style filming, though.
At least there were a few actual laughs in the movie -- the audience tittered appreciatively.