I've had dealings with the Rational Recovery people and I was not impressed. No one's ever done studies of their success rate, but I can't imagine it would be any better than--or even as good as--that of the various 12-step groups.
12-groups are easy to hate, easy to target. They have slogans and rules and books and pamphlets and "sponsors" and "phone lists" and all sorts of easily made fun of programs. And they have disciples, who sometimes take them so seriously they seem like cult members.
But even if they help ONLY 25% of the people who show up, that's an awful lot of miserable lives made livable. And an awful lot more, if you count in the lives of their family members, co-workers and friends. They're affected by addictive behavior too.
I've had dealings with people whose lives have been transformed by AA, Al-Anon, NA, MA and DA, most of whom were agnostics or unaffiliated with any organized religion. None of them ended up having obstacles with the god/higher power thing. The REAL obstacle is always resistance and recidivism. The god-thing becomes just another excuse to stop going to meetings and "slip."
Like any other transformational program, it's not for all people. But if you need help and you WANT help, keep coming back, as the slogan goes. Just work it. You're worth it.