The style of this book makes it unsuitable for pleasure reading. The books I read for work obviously always take me a long time, because my job is not to read hahahah (I wish).
It's true that it gives more details than the historical/trivial ones, it quotes works a lot, it has almost an intertextual perspective of how texts were interwoven. My favourite chapters were the more abstract ones, the last three chapters, which talked about humour, power and religion respectively, how all those concepts were manifested in literature and how the Greeks/Romans understood them.
I think I will retain quite a lot after reading this book, at least it was useful to better locate authors and works apart from the most typical ones.