Buying this book is perhaps one of the best choices I have made in my life. It helped me improve my interpersonal relationships and become a slightly better person

Very good book. I learned a lot and I can say that it helped me a lot in my interpersonal relationships. I sell better.

One of the best books for someone who wants to start working on themselves!! With many examples and real stories, easy to read and practical!!!

Good book, it teaches you how to behave towards others in order to win them over and not make unnecessary enemies!

I read it among other things because it is considered a classic.
It has steps of achievement but it is "old-fashioned" and a bit... personal opinion

One of the best books I have ever read! You must read it without a doubt, as well as apply in practice what the author mentions. Simply perfect!

It helps you change your way of thinking, most of the advice it gives is from personal experiences and experiences it had, it's worth reading.

The book is worth and more its money. It didn't tire me at all. It remains timeless even if it was written in an earlier era

It doesn't teach you anything you don't already know. I got tired of the many stories and old examples before presenting each advice. It's worth a read to remind us of basic behaviors