I love this supplement for everything it brings to my White Star game. Aliens is one of my all time favorite tools and I much prefer the d20 skill system presented in Hyperspace Messenger over the d6 skill system introduced in the White Star Companion. Stunners, Robots, Vehicles, and Cyberwear all bring a bunch of useful goodies and systems to use as you desire and I'll be bringing some of these things into my games to keep my players on their toes. Finally, the last chapter is a handy addition for quickly designing sectors of space.

My only complaint is the main font used for most of the text. It appears slightly faded. That being said, it is still highly readable and the rest of the art and graphic are very nice looking.