I have to say I was disappointed, in that the movie vacillated between awesome and insipid. Almost every scene with Damon was great, whether he was jumping through windows or talking to other characters. But whenever he was offscreen, the movie just ground to a halt, with Joan Allen and Strathairn grandstanding for their employees, bosses, or each other.
Also, I was down with the shaky-cam in the Bourne Supremacy, since I could still generally follow what was going on, but in Ultimatum is just seemed over the top. For example, I could tell when Matt Damon rolled up the magazine to start beating on the German in Supremacy, but when he started using a washcloth to defend himself in Ultimatum, it took me a while to figure out what was going on; it also took me a second to realize he used the washcloth to strangle Desh. The shaky-cam simply drains the visual energy out of explosive actions, like jumping through windows, or cars crashing into each other; they all look the same.