I recently finished reading this book.
I am glad that I read it. I have given away many garbage bags full of stuff to Goodwill, I have thrown out garbage bags full of papers, my drawers have never looked better! This book really motivated me to look at what I own in a new way.
The most valuable lesson I learned from Marie Kondo is:
Only Keep What Brings You Joy
I would recommend this book, but I would first warn you that she is is an organizing expert from Japan and not all of her practices will apply to American families (especially big American families).
I would also like you to know that I don't talk to my belongings :) You will understand if you read the book!
Overall, I am glad that I read about her method of decluttering and organizing!