Terminator Salvation was pretty darn good. Lots of action, that's for sure. Critics aren't giving it very good reviews, and that's probably because you don't really get to know the characters much. They're all pretty two dimensional.
My biggest complaint is in the trailer for the film. It gives away one of the plot twists..even though most of us would probably figured it out pretty early on. It would have been nice not to be sitting throughout a good 1/2 of the film, knowing what was coming eventually.
Not as good as Star Trek; but, much better than Wolverine, in my opinion. (And, tons better than Angels and Demons.)