Just got back from seeing it. If you like the action parts of a movie then this is a good one to see in the theatre. It differs enough to stand on its own with a small number of "elements" from the first one. Otherwise wait for it to come on cable or DVD. I do call BS on the Subway part as no one will be using it much in that "situation". You'll see what I mean.
Addendum: I feel that I should mention that the movie is set in and around Spokane, somewhat close to Claire's stomping grounds. Most of the action takes place in the city itself and among bystanders who sometimes "help". Which I feel is somewhat realistic. Most people don't mind helping on the spur of the moment whenever they can, but would probably feel lost with anything more " longer termed".
S.