I've also seen it put this way, and I think this is about right:
"What is your goal? If your goal is to DB the divorce, then DON'T go the "best friends" route. It's counter-productive to effective DBing. If you're DONE, however, and your goal is to just have the most civil, even friendly co-parenting situation with your ex-spouse, then it's probably the best way to go."
