I wasn't that interested in OSR products. But I was looking for a game that would scratch my Sci-Fi space itch. Much to my suprise SWN did the job just fine. Suddenly I was hooked on hacking OSR games to make my own adventures.
This book is both light and easy to read, well presented, and most importantly, gameable in less than 30 minutes! (Depending on how fast you read.) The core combat rules are OSR easy, and the skill system is one of the better ones I've seen in OSR variants. (If they use Skills at all.)
But what made SWN shine for me was the sandboxing options. There are plenty for starting GMs. For me though...I need more and I'll write up more for myself.
I went with the core edition because I wanted to support the writer and the mech/robot rules were useful.
Now the trick is finding the money to get a nice hardbound copy down the line. It's that good.
[5 of 5 Stars!]