As they say, any publicity is good publicity.
I read it over a year ago and my impression of the book is probably as vague as the author's impression of his two years at HBS. He definitely did not immerse himself.
For example, his description of a job interview sounded like it might as well have occurred before he enrolled. IIRC, the interviewer shifted gears early on and chatted with him for the remainder of the time slot about his previous work experience, which was admittedly extensive and interesting.
Being a journalist, I guess you could say he treated his time there as an article/book assignment, this time for himself. (Apologies to GMAT studiers who might be jarred by this sentence but let's treat this more like spoken conversation please
)
The lesson is probably to think beyond graduation before matriculating.