I did not find this book magical or life-changing. As someone who enjoys cleaning up and organizing my things, I was hoping for a windfall of advice on how to keep my minimalistic home neat and tidy. If you're like-minded, then I suspect that you'll find very little useful information in this book.
Within the first pages, the book did warn me that Marie Kondo was writing to people who need to develop the habit of tidying up. She makes the assumption that her reader is not already tidy, which is a shame. I'm sure there are many other tidy people out there who just want to maximize their tidiness.