I just read the first 6 chapters today. Can't say I'm impressed.
I agree with the general premise, but can't possibly see how that book would help me maintain sobriety. First four chapters basically say alcoholics can't control their drink, and spirituality is key to sobriety. Ok, cool, I agree, but already knew that.
I don't agree with how they imply just open your heart, talk to God, and you'll instantaneously have a spiritual awakening. Sorry, but no, that's not how it works. It takes months or years of learning, guidance, practice, and meditation to align your body, mind and soul to become at peace with both, yourself and the world. It doesn't happen within the span of 5 minutes.
They imply you need to be fearless, and I can understand their point of view, but disagree at the same time. I do understand we do need to let go of the pain from the past that causes fear stopping us from journeying into our new sober life. That I get, and agree with, and totally understand how spirituality can help you obtain that level of existence.
I don't agree with becoming truly fearless though. Fear is one of the most powerful emotions we have, and it's there for a reason. It's a natural defence mechanism, and it keeps us alive. Going through life without fear is naive at best, and suicidal at worst.
Then maybe I've just been living in a Buddhist society too long, but a good portion is just the way things work here. For example, someone who is "spiritually sick" as the book calls them is generally naturally looked at with tolerance and sympathy, not fear and resentment.
I don't know, to each their own, and if it helps you, then great, and that's all the matters. For me personally, I think learning about Buddhism would (will) be far more beneficial to my recovery than the Big Book.