I picked up a used copy of this about a month ago. I was cruising Black and Read in Westminster CO looking for a copy of Buck Rogers XXIV or Gamma World 1e. sadly the store didn't have anything from the 80's except several copies of the Greyhawk set, which I do not want, really.
Anyway at as I've said before, I'm cheap, but at 25$ for a copy of this frekin' colossal hard cover, I couldn't say no.
Anyway, it is awesome; I will be running it when i finish with my Icons game. I've already outlined my setting.
I think my favorite thing about it is the fact that everything (from PCs to starships to empires) is built the same way. Normally I'm not so crazy about unified mechanics, but space games are fucking complicated and the less for me to learn the better.