I enjoyed the dark and emotional relationship between the main character and her mother. It was horrific at times, far from ideal and you do feel genuinely sorry for her. At times an (acceptable) struggle to read. The balance between disliking her mother and acknowledging her responsibility of looking after her is portrayed so well. It really encapsulates how painful and stressful it is to look after a parent in need, but the added layer of their difficult relationship is what makes this such a worthwhile read. You feel every pang of hatred and betrayal.
I listened on audiobook, and although it was well read I did need to re-listen at times. I think this was more to do with the irregular pace and succinctness of the writing, I kept missing important elements among less important parts of the plot, otherwise would have been 4*.

I can understand the many merits of this book. It is a clever and considered novel asking questions about memory and their changeable nature, family relationships (particularly mother daughter relationships), the consequences for women who choose to make themselves happy and obsession. 

But I didn’t enjoy it. It was a very slow read, too clever for its own good, prizing point-making over storytelling all wrapped up in a pessimistic narrator who left me feeling hopeless. 

If you want something slow which will make you think then go for it, but I was in the wrong mood at the time.