Terry Brooks' Shannara universe

How is this series? I lost cable recently, so I've gone over reading some old books I have, and one of them happened to be 'Running with the Demon', which I really really am enjoying. I looked it up on wiki, and its part of a prequel series to this guys' whole fantasy universe. So I was wondering, if I loved this book, is the rest of this series worth checking out?

I first read the Shannara books when I was 13 or so. I enjoyed them.

Recently I tried to reread them. Good lord...