Overall, an enjoyable movie, until the end when it felt like the director got sick of the movie and said "that's a wrap. everyone leave".
Fortunately, they didn't go overboard with the usual lousy computer scenes you normally see in a movie. In fact, the whole name of "Firewall" is poorly chosen.
If you're looking for a simple pseudo-thriller that follows the typical script, you'll enjoy this.
If you're looking for more than that, look elsewhere.
This film is just an average run of the mill rental and really would not be that impressive in a DVD collection... If you miss this dont worry you have not missed out!
I give it a five out of ten. Had some enjoyable moments, but like I said, it simply ends poorly.