This DB has helped me without a doubt.
It would have been a longer process of healing without it.
I would still be interested in exit counseling as Gary as discussed though.
So overall, yes, I think that they can be helpful if a DB is used within the bounds of what can be realisticly expected as helpful.
Take what can be gleaned from a loosely structured non-professional setting of people who have gone through similar experiences and move on from their in your life.