I think you'll like it, for the most part. Even the ideas that might make you a little uncomfortable with your own role in your marriage are done in a kind way to soften the blow a little, which is good.
Scharch had several main ideas that I thought were really important:
1. Almost no one stops desiring sex randomly for no reason. People who don't want to have sex with their spouses have their reasons. However, often, neither party wants to know the reasons because it's scary. But never assume that a SSM comes from the LD partner having some sort of nebulous "problem" and being abnormal. There's a reason. Count on it.
2. Marriage is hard, and it's supposed to be hard, and it would never work if it were easy. It's ok to wish it were easy, but it's ok that it's not. Marriage should involve what feel like crises, and a big part of making a marriage work is lasting long enough to understand that your marriage is not ending every time there's a big fundamental conflict--those are normal and if you get through this one there will be more in the future.
3. Building on #2, marriage is a "marriage crucible" that will make you better and stronger if you work at it--but it will hurt along the way. A lot. It's not painless and it's not easy. There will be easy, joyful, painless periods, but if you try to preserve those forever and avoid strife and conflict, you will stagnate and the marriage will die.
