EZ Space could use more than a bit of editing. There are misused words and spots where the layout is rather sloppy. Reminds me of the old days of RPG's, before word processors.
It presents some elements of a setting, but not nearly enough to run a campaign without considerable work on the part of the GM. Also, it doesn't have much of an old 50's science fiction story or movie feel to it. The technology often seems more Star Trek The Next Generation in a retro box than Forbidden Planet or Destination Moon.
The setting does have Nazis and Communists for the players to butt heads with, just as vile as they always were and now with saucers and spaceships.
The few included adventure seeds are quite usable. One's more horror than space exploration, but it's good horror though incredibly gross.
There is a simple RPG system included at the end of the book. It's a percentage system, usable but nothing special. Probably would have been better to include more setting info.
To all people of Faith, any Faith, prepare to be offended. The author makes no attempt to hide a complete contempt for people who believe in 'their imaginary friend in the sky'. In this future, religion has all but died out on Earth due to contact with alien beings. The religious have moved to their own, no doubt backwards, planets. Really? Don't know about anyone else, but my beliefs wouldn't be shattered or even mildly shaken by discovering other intelligent life exists in the universe. Neither of us is going to change the other's mind, so why don't we all practice a bit of polite tolerance. Really, just for purely selfish reasons you might want to practice a little civility rather than insulting buyers and potential buyers of your products.
To everyone who doesn't have a rabid hate of Ronald Reagan. In this setting he was assassinated in his first term. Come on dude, the man is dead. Get over it. No one not in the Hitler, Stalin, Mao, or Pol Pot league of mass murders deserves this much hate. For your own mental health, if not for common decency, move on.
Ah well. I hope this was of some help to prospective buyers.