How successful are these techniques? Who here has had success? How long? Was it lasting?
Depends what the "success" is to people. Getting your spouse back? Moving on with your life without your spouse but with your pride and honor intact?
I'd say both of that can be considered success.
How long? As long as it takes to reach the goal you set. You will know when you're there.
Lasting? As long as you make it last.
DB is all about YOU. Getting you life in order and feeling good about yourself is the cake. Getting your spouse to stroll along with you in your journey is the icing.