I watched it last week. Fantastic movie. I don't watch many war movies (in fact this is one of my first ones), but I really, really liked it. I didn't even notice the two hours go by.
The one-shot effect is really well done, and I enjoyed trying to spot the transitions.
It's not an exceptional movie or anything like that, but it's one of the rare times I just went into the theater and came out exceedingly satisfied.