After seeing Inception 2 nights before and than seeing Salt it is a very good basis for comparison and Salt is a very fast moving action movie that also requires that you pay attention to details in order to figure it out, and it's not easy to figure out. Very violent but not disgustingly so.
I really didn't want to see the movie but wife did, we went, I actually liked it much more than I expected, the trailers make it look much different than the actual is, looks like a real terror type, but has a much more interesting story line...enjoyable