For me, this book only really comes to life after the author meets, then breaks up with, her Gypsy Husband (GH), who is actor Colin Farrell (though it's never explicitly acknowledged). Although it had been engaging and witty up to this point, which is why I stuck with it, it acquires a new depth in the aftermath of the relationship - chapters 33 to 35 are particularly powerful - and becomes ever more moving.
So if you waver early on, wondering if you can take all the self-obsession and cheesy parties and almost-chick-lit fluffiness, don't be put off. By the end of the book, you'll realise what it really is - a kind of threefold love letter to her therapist, GH and her mother.
Most books begin well, then fade. This begins a little shakily but develops into something really quite lovely.