Zombies!!! What more can you say...they are an SW staple.
However, you get more than just the run of the mill SW zombie. There are hunters and smart zombies and the list goes on. If you really want to scare your players with a variety of the undead then this is a great product for you.
The various ideas for campaigns is great. You may not want to use one as written (you may) but they are great sources to get your imagination flowing. I really like the idea of the Romans facing not the Germans but hordes of zombies!