This is by far one of the best products to come out of the OSR movement. The game is itself not truly a retro-clone, yet its close enough in spirit to a certain old school game that it captures a healthy dose of nostalgia. However, don't let that fool you! The nostalgia is quickly rooted in a very well done and solid game that honestly stands on its own two or three or however many feet it may have. The book is well layout and very easily digested. I will be grabbing the art included version in the near future and may even buy a deadtree edition. This is a very good game.
The only real criticism I have is that while random table are a blast for some games, it would have been nice to a a side note or two about cherry picking mutations for those gamemasters that may want them. This isn't a game breaker though, it is easily house ruled. In fact, much like all the OSR entries, it is by its nature very easy to house rule and modify to your hearts desire!
[5 of 5 Stars!]