Pretty solid read. Rooney manages to flesh out her characters pretty well and isnt afraid of letting them repeatedly make the same mistakes, which although frustrating at times, makes them both believable and relatable. 
I do agree with some claims about there being a lack of an arc for the story though. It felt like it didnt really go anywhere and the reader simply ends up with a glimpse of the main character's life, which ends on a rather bittersweet note (which i wasnt exactly against. It circles back to one of the things i believe this book does best, allowing things to end poorly or unsatisfactorily and having them remain that way).
Not necessarily one of my absolute favourite reads, but one i've come to be fond of. would reccomend.