I bought the book and really like it. You all have to remember this isn't for everyone. If her method doesn't resonate with you, that's okay. You can choose to "return" the book and get your money back. Her know-it-all attitude comes from years of experience and actually potty training over 200 kids which is more than most moms or doctors can say. And yes, I agree that her video is a little annoying but this doesn't take away from the fact that she has the experience. When you buy the book, you also have access to the forum which is really helping me right now and if you can't find your answers in her blog or on her forum, you have direct access to her via email. The book provides the foundation to her philosophy and the forum provides troubleshooting. And you do want to read it all before you begin. You will be so much more prepared for the main event.
Regarding her defensive attitude, I think it is geared more towards moms who want to potty train their children earlier than the current Western social norm (in Western society, we PT at about 3 yrs? and in Eastern cultures, they PT by age 1. Actually, 50% of all children in the world are PT'd by age 1) and providing them with some information that supports their decision. I have met resistance from other mothers and family members for the decisions I have made: home birth, cloth diapering, BLW, my aversion to pink EVERYTHING for my daughter. So it's nice to have someone in my corner who supports my choices. Jamie G. is not trying to guilt trip, she is trying to educate those who feel like the mainstream way isn't the way for them. She's letting us know that we have choices!
As for me and my daughter, she is 1.5 yrs and we are going to try in about 2 weeks. I tried about a month ago, but didn't read everything so it was very stressful and frustrating. Little did I know that we were on the right track. Mistakes means she's learning!
I would say that if you want to give it a try, really go for it. Don't dismiss her method before you know anything about it. Remember how we tell our kids to at least try the broccoli when they say they don't like it and they've never even tasted it!
And her best piece of advice was if you really don't want to do it, hire it out to someone else, a babysitter, a nanny, your cousin, your mother... You don't HAVE to be the person to show your kid the way of the loo.
Good luck and good pottying!