I did not like this book.
There were a few nice pieces of writing, like the description of chronic nerve pain as "red webs", but mostly the writing felt clumsy, messy, and melodramatic. It has the feel of an edgy teenager's fanfiction, but not in a good way.
The plot feels very cliche but also doesn't resolve in a way that feels satisfying. It seemed like it was going to go in an interesting direction a few times, but then consistently took the most obvious and least interesting path.
There is also a bunch of weird moral implications? Maybe I'm missing something but the main character really seemed to be portrayed as a bad person for being unwell and angry about it. It was also peppered with fatphobia, and had a similar misogynistic undercurrent to Bunny. 
Also similar to Bunny, the implied experience of madness/psychosis/delusions felt very much how someone without much actual information or sensitivity around the subject would write it. Gave me the vibe of, again, am edgy teenager RPing as a ~crazy~ character. 
Overall disappointing. 

Reading Mona Awad's books requires a certain amount of faith. It is a leap, in a way, to give yourself over to the extreme and the absurd so wholly. Is it worth it? Will I reach the end of the journey and wonder whether the journey even happened? I've certainly felt that way reading literature like this before. Bret Easton Ellis comes to mind. But after reading 'Bunny' and letting myself go along for the insane, quirky, ride, I knew what I was getting into when I started 'All's Well.'

I'm so glad I was able to put aside all of my concerns and preconceptions, and dive into this work. 'All's Well' is a story of magic, of witches, of the fantastical and the mundane. It's also, primarily, a story about living with chronic pain. How it feels to be rendered invisible to professionals and loved ones alike. How it transforms you. 

I think this book is an absolute masterpiece. I loved it even as I hated it.