A few days ago I did listen to 3-5 minutes at the beginning and read the exact comment you posted. I do plan to listen to it more. The biggest thing is to put aside is judging a book by it's according to my own assumption.
I can understand that. I think it helps to think of it like this. Basically a long time ago, a guy realized there was no such thing as a guide to getting along with other people. Rather than come up with his own ideas, he looked to leaders that were good at inspiring loyalty and admiration. He studied history, conducted interviews, and read biographies with the goal of learning what made people great communicators. He especially payed attention to those who were liked by not only their peers, but also people below them in socioeconomic terms. Bosses who made their employees happy and productive through sincere appreciation get a lot of attention.
At one point, the author shares a quote that he clipped out and pasted on to his mirror so he sees it every day:
"I shall pass this way but once; any good therefore, that I can do or any kindness that I can show to any human being, let me do it now. Let me not defer nor neglect it, for I shall not pass this way again."
In many ways, the book is about being a better person, and being the type of person that you'd want in your own life. That's why I posted it as a response to this thread.
To use an example from my own life, I had a co-worker a number of years ago that did really inconsistent work, and it made my job harder because of it. Before reading the book, I would have known enough not to criticize her in front of other co-workers, and I would have tried to say something nice before or after pointing out that she wasn't doing her work right. Instead, I took an example of her best work, and I brought it to her. In front of a few other co-workers, I thanked her for work, and I explained what I liked about it. I told her that I was glad to be working with her, and I thanked them all for the work they do. In doing so, I was able to educate several co-workers at once about how their work affects mine, and I was able to do so without criticism, or making anyone feel attacked. Not only that, but I was able to make my co-workers feel appreciated, and everything I said was true.