I really liked the two previous movies, so I was looking forward to The Bourne Ultimatum and I was not disappointed! Lots of action, a good story & intrigue and very little special effects, it would seem. In Sci-Fi, you want tons of special effects, but in an action movie such as this one, "real" is better. There isn't a lot of humour, but there is one scene that made people laugh and even clap (I'm pretty sure I wasn't alone in this).
Matt Damon plays Jason Bourne again and he's really good at playing this character. The rest of the cast is also very good. Bourne's real identity is a big secret, including to himself, but as he remember things, he wants to know everything. That's his only goal in this movie, finding out who he is and why was he chosen. I won't give out the details, of course, but he does reach his goal. Lets just say it isn't an easy task when you have the CIA and all it's resources against you.
Will there be a sequel? In a way, it seems unlikely, since he achieved what he set to do. But it's always a possibility, as with any successful movie and the end of the movie does keep the door open, if only a little bit. Of course Bourne can simply kick it wide open...!
Even if you haven't seen the two first movies (The Bourne Identity & The Bourne Supremacy), I think you can still appreciate this movie on it's own, as a great spy/action movie.