This is my sister's book and I've been wanting to look through it every time I watch her cats. 
I finally did this time and I see a lot of her choices reflect Joanna's style so I'm not surprised she owns the book :)
A few things really bothered me throughout the book, as a person with OCD it doesn't really affect my cleanliness but it definitely makes me notice things that feel "incorrect" for example her book placement and the fact that a lot of newer, rich-person design styles just look extremely difficult to clean. 
I think it must also be really popular to have bare-bulb lighting in cages, and many many decorative pillows. But neither of those things appeal much to me so it felt redundant seeing so much of it. 
Why would you place books backward on a shelf so the pages are showing? And what person who cares about their books would put them under all of their plants??
The last thing is just that all of her kid spaces just looked like kid-themed adult spaces. 

But I loved a lot in the kitchen and living room designs, and I really liked reading through her advice in each section on what to do for whatever your house is lacking. 
I'm about to move again (I think this one makes 10 moves in 9 years) and I'm excited to make this one feel a little more like my home because I'm hoping to stay longer. It might be difficult as I'm sharing the decisions with my roommates, but there's more space in my soon to be new home and I hope to really make it cute and useful.
Anyway I can't afford much and I can't make big changes to rental properties but there are so many inspirational things to think about and I also just like looking through the pretty pictures. 
My favorite rooms in the book are on pages: 70, 78, 108, 198, 214, 238, 306, and 326. 
I wish there were more libraries and hobby rooms to look at, like dance studios or music rooms or workshops. But I think she mostly designs houses for families in business-type careers so it makes sense that they have similar needs.

My favorite of the pictured houses from the outside is probably either "the minimalist lodge" or "the unexpected estate" and from the inside is definitely "the daring elemental" 
In the "identify your style" section, all of them look the exact same to me as it's all just stuff you'd buy from a high-end version of a home good store. I grew up with plastic cups, mismatched silverware, and whatever rugs we found at garage sales... and when it comes to design the things that are most striking to me tend to be from cultures and traditions other than my own. So seeing all of the options look basically the same was a little disappointing. I think it would be more accurate to leave out the style comparisons and just say that everything here is Joanna's style and leave it for readers to enjoy and take what they want. 
Anyway despite having some criticism I really enjoyed reading through this book! I haven't really watched any of her stuff, I just have a vague idea of who she is and what she and chip do so maybe I'll look into her more.