AA can be quite useful to some in the early days, when life is pretty shaky, literally or other wise. It can be useful to some as a place to talk and get support. AA can be useful to some as a place to go when all the bridges have been burned.
I can only say: know why you are going there; know that AA is only one option amoung several. Also know: people quit abusing when one decides to stop abusing; AA is no more capable of getting someone to stop than any thing else is.