If you are looking to play in the scenario presented, it's an excellent module. Beyond that, if you were hoping for a lot of new rules, you'll likely be disappointed. The "new rules" are mostly tweaks on the existing ones, and there's a few for "troupe play" that are no especially useful.
There are a bunch of villain datafiles, but only a few are "big bads", and about a third of the hero files are rehash from the corebook.
For those looking to play the Civil War, it's a great supplement; if not, it's a pass, in my opinion.
[3 of 5 Stars!]