I think this book is underrated somewhat. This book was a pleasant, delightful and HILARIOUS read, and it really made my day. 
 The best part was definitely the verbal crossfire between protagonist Fiona and her "husband" Todd. What I also love about this book - the main male character, though swoon-worthy and all, isn't the main character's love interest. He already has a girlfriend. And the loyalty and trust they show towards each other is fantastic. Who needs to go through some marriage course when people could just watch them (though they exhibit a tad too much PDA for my liking). Not to mention that I am already bored with books where the main two characters of the opposite gender always, ALWAYS have to end up with each other. This book was refreshing in that case. 
 Alright, on to the bickering! I loved it. The conversations/arguing/verbal attacks oozed with sarcasm, and would have brought me to the floor in humiliation had I been in either of their shoes. This book almost became my self-proclaimed "Ultimate Guide to Daily Interaction with the People Around You", but come to think of it, such remarks and attacks could never be used by me on my friends (they're just too harsh), and I don't bother wasting my breath attempting to converse with my enemies. Too bad, really. 
 One thing I didn't like about the book was, basically, the main character. At least in the first half of the book. In the earlier part of the story Fiona acts really bitchy and selfish. So bitchy and unaware of her flaws, I couldn't exactly connect with her. Her attitude was almost like, inhuman, that it became rather predictable. I mean, after acting like that, surely we should be expecting her to repent and all in the end right? Which she, of course, did. Too predictable. 
 All and all, this book was great! I wonder if high schools in the USA are like that? If so, it sounds really dangerous, like a man-eat-man world. But it definitely means a lot of fun.