I chose to read this as I suffer from ME/CFS myself. On the whole it is a good book and reflects how the illness affects the sufferers and their family.
On the down side the characters both had very severe ME and this at times made the story feel a bit unreal. The majority of people with ME do not have it as severely, but are badly affected and cannot lead normal lives, but because they are not totally bed ridden all the time they are dismissed as not ill.
When I first started reading it I kept thinking I would pass it on to everyone I know, so they could understand my illness, but I was soon left thinking, they will still not believe me as I am not as badly affected.
I liked how the book also mentioned peoples atitudes to the illness.
I did find the ending a bit unrealistic too.
On the whole though I felt it was a good book.