I'll start with what I liked:
The author kept numerical track of how often certain things worked. It was nice to know what failure rates to expect such as "Ok, you need to do this 10 times cause 9 times its going to fail". And "Once you get really good, its still only going to work 40% of the time."
What I didn't like:
That being said. The author is one of those guys who gives the whole thought space of trying to improve with women a bad name. People like him are the reason you go to a pickup meetup and walk away with a weird feeling in your stomach about some of the guys you just met. The best I can describe it is this: A lot of these men start out as incels. They're men with gaping holes in their emotional intelligence. They very often never improve on their emotional intelligence (possibly because its not possible for them, possibly because they are too emotionally weak to love more than their anger). Instead they brute force using their intellect. Eventually they do have success, and I believe he has a lot of it. But at the cost of bonding LESS with women instead of more. Creating very superficial relationships and viewing women as objects instead of having relationships that are fulfilling. If you read about this guy now, he still struggles with peace and happiness because he's figured out a way to achieve what he thought he wanted, but in a way that made him very unhappy.
Here's an example: shortly into the book he says "Until I know a woman, I only view her as a warm place to stick my d**k." He goes on to explain that this is because he's not going to give her any part of himself until he knows her and they have a closer relationship. This makes sense on the surface, but think deeper. Think of the violence and weakness in what he is saying. He is saying he can't look at a woman as a person and love and respect her as a person until he knows she won't reject him. Despite all his hard work, knowledge, and success, he still hasn't improved his foundation. He still doesn't have real confidence, strength, and peace. Grit though. I'd say he's got a lot of grit.
The problem with this is that his whole mindset is communicated in this book. Its not the right way to go about solving the problem. Its 10 times harder to do it his way and you'll end up only a 10th as happy.