I re-read this book and did not find it as complex as I did initially. Whilst you may not agree with Nietzche's philosophy, you cannot fault his passion and reasoning in his arguments. Given the age of this book, his outlook at life and the structures of civilisation are still fresh and resound with a truth that is still profound to this day, possibly because he talks about the nature of being human which never changes despite our progressions and evolving technologies.
Nietzche revels in the flaws of humanity and explores it until he finds triumph in defeat (i.e. whatever does not kill us makes us stronger... etc) There is anger, madness, despair, confusion, solace, and ultimately hope in his writing as there is in all aspects of human life.
His maxims are an excellent interlude to the book and are poetic and truthful and provide food aplenty for the brain. I would suggest that if anyone who would like to read Nietzche but is unsure, peruse the maxims at first as this is Nietzche as his most bite-sized accessible if not the most provocative or antaganostic.
A great book by a great thinker.