This book is great! As a stand alone is a wondeful sandbox generation system for post apoc settings. I love the SWN variant of the OSR rules and characers while chrunchy early one do feel skillful. The rules are tight and allow for a range of characer options.
If you are a Stars Without Number fan consider this book the ultimate ruined world plug in! It gives you options for mutations, new psi powers, and survial options in destoryed/decaying worlds. The 4 new classes are servicable but might need some skill updates of space travel becomes an option.
Finally the book itself is up to Sine Nomine standards. Easy to read, nicely written, and expertly layed out.
Well worth the pdf at least.
[5 of 5 Stars!]