At the beginning of the book, Rubin breaks down humankind into four main categories: upholders, questioners, obligers, and rebels. From here, Rubin defines the characteristics of each of these four personalities, and how habits specifically relate to each kind of person. The biggest pro of the book for me was that once I was able to identify myself as falling into one of these categories, Rubin regularly comes back to these categories while outlining different habit-forming techniques while also providing tips and tricks for habit formation.
While I did enjoy the book, it was hard to ignore Rubin's condescending tone that was evident throughout the book. She gave off a holier-than-thou attitude because, as a rare upholder, she can easily form good habits. The book was also filled with anecdotes of her efforts to also help transform everyone in her life, and while some people can certainly benefit from such attentions, she gave off a smug and nagging demeanor that really turned me off from her writing.
I received this book from the Blogging for Books program in exchange for this review.