Depends on what your after
There's definitely no reason to avoid it.
It's not intended to be the same level of information as Professional Blackjack, BJ Attack, etc. I'd call it an overview of Advantage Play.
I picked it up at a used book store (sorry John) and have really enjoyed it. He touches on a wide variety of advantage play which made the book interesting, got some creative jucies flowing and helped put some pieces of the BJ puzzle fall into place.
I'd buy it again (at full price :)