In Summary: A good expansion to a good superhero RPG, expanding the types of games you can play. (Anyone remember Super Agent for Champions?)
A useful and interesting expansion for the SUPERS Revised RPG, giving a number of rules expansions that make the game more Action Hero than Super Hero.
The additions to the combat rules makes combat slightly more complicated (figuring out weapon damage took me a few tries to remember what gets added where and when), but the new Ammo rule is great and the chase rules are good enough to steal for other games (and I will!).
The new Organization rules are interesting for those GMs that like a bit of solo-gaming at the camapign level, letting big groups fight each other and create new problems for the PCs in a way that doesn't rely entirely on GM fiat. The organization write ups included in the book give some nice generic groups that can model a number of organized crime and law enforcement groups, as well as some fully fleshed out groups that can be dropped into - or inspire - a full campaign.
There are a few things that I feel would make this into a full 5 star product - a few fully worked out character examples, a few semi-developed camapaign ideas, and some more developed rules on how to use powers from the parent SUPERS Revised RPG in Search & Destroy. All things a decent GM can do on their own, but I feel they would really enhance this product that extra bit.