Maybe closer to 3.5 stars, but it motivated me enough to dump more of my junk that I bumped it to four stars. 
 What I didn't like: 
 * Kondo repeats the same information too much, along with sharing too many similar stories. But hey, if she only mentioned the process once, and it efficiently, she'd not have a book. She'd have an article in some magazine. 
 * Her continual mention of how many *trash* bags her clients have dumped. Do people really have that much crap that must be thrown out instead of given away (or sold, if you have the energy for that)? No mention is made of donating items to charity or to friends, though one of her clients now looks forward to trash/recycling pickup day with glee. 
 What I liked: 
 * The basic premise that we all have way too much stuff, and it affects other aspects of our lives as well. I've seen Hoarders, none of those people ever seem happy. Kondo is hard-core about how to get rid of things, but I can see how her method works, without people backsliding. 
 * Speaking of her method, while it's difficult to not feel silly thanking your items for their service to you, or whatever they did for you, it also made me feel better about dumping some things. I like the whole "does it spark joy for you?" approach, though certainly there are plenty of things that don't spark joy for me that I must keep because I need them. Another reviewer mentioned an interview suit, and yeah, that's a perfect example. 
 I used to have a much more iron grip on my possessions than I do now. I went through my first big book purge about 10 years ago, and still remember how good it all felt. Over the years I've learned how to purge my things pretty well, but I could still use some help. The KonMari Method has given me the little push I needed to tweak my purging (or 'tidying') and pare down even more, all the while feeling good about it. 
 The hokeyness of this method will turn many people off, but if you're ready to get rid of stuff, I'd recommend at least skimming through the book to get the basic idea. While I don't think this will be "life-changing" for me, nor do I think that my tummy will slim down as my possessions exit my life, I'm still thankful for this book, and will be returning it to the library with joy in my heart.