When she reads her own book, she alternates between lithium-slurred
speech and professorial lecturing. This certainly adds authenticity.

Some editing would have helped: she is explaining why she is openly
discussing her illness in at least three different places in the book.

Key is certainly not a nuanced writer: all people around her are
either great or, very seldom and unnamed, horrible. This is probably
because she did not want to offend anyone in her memoir. She is often
didactic: she tells the reader what the conclusions are.  She is more
used to writing research papers. She does occasionally throw in
fifty-cent words or crafty sentences and often hits the target with
them.

She did some hard living with her multiple romantic engagements.

Not being able to focus on written text would be a hard curse to bear.

Not as deep or colorful as the first part of Salomon's Atlas of
Depression. I enjoyed "barking mad" though.