Some spoilers ahead to explain the rating (not hidden), I implore those who are willing to read, as the glowing reviews misled me. Skip to the bottom for a summary.
I'm not entirely sure that I read the same story as all of these other reviewers have, but in no way, was this story "light and feel-good". This story was about the serious workaholic Katherine and the womanizing Ali. Throughout 90% of the book, Katherine and Ali are literally fighting and making off-handed comments about each other, from the time they were 21 and in college, up until they were both 38. I was constantly questioning as to why neither of them had matured (albeit, Ali matured a lot more as a character than Katherine). Their arguments seemed bitter and contrived, and quite honestly, childlike for the sake of a fake "slow burn" romance.
At about 80%, after having finally formed a semi-friendship through going to Yoga, Katherine is suddenly hit with the reality that she's in love with Ali, from out of the blue. From there on out, she battles with her desire and decides to keep her crush hidden; as a result, she starts ignoring and lying to the few friends she has, including a commitment she made to Ali 2 months in advance. All for the sake of not showing any signs of a crush. This obviously did not sit well with Ali, and then they were enemies yet again, only to have make up sex the next day and claim that they were in love, the marriage kind (this actually happened).
I hope I don't have to explain why having a book with 90% cat fights, and then a sudden romance and declaration of love in the last 10% is off-putting.
In summary, this book is all drama and very little fluff. It's not the 'throw the book across the room' drama, but drama nonetheless. If the above intrigues you, have at it. I just don't want others to be mislead by the blind glowing reviews claiming that this book is a romcom or feel good book. Anything but, very little humor if I were to be honest.
Oh, and the last 10% of the book (from 90% on) is an excerpt from another book, keep that in mind if you're considering price and length.