For me, it has helped in that it gave me insight into his personality and that's really it. There was a section in the book I read entitled "How to get along with me". I read it over and over, trying to commit to memory the particular little quirks about my H (and they were right on the money) and how to go about interacting with him.
For instance, there was one priceless one that said "Don't overreact to my overreacting". That has come in handy with some recent bad news that has affected our family.
I think I had a tendency to take his quirks personally, as if they were things he was doing solely to annoy ME, lol. Also, reading about myself and how I "come off" to other people was a very humbling experience.
