This biography is very readable, and is valuable precisely because (despite the other review) it gives one a feel for Nietzsche as a person, rather than just being a biographical sketch, as are most books. However, I have some concerns.
First, given that Nietzsche has been claimed for just about every political and philosophical position known to exist, from fascist to communist to sexist to feminist, I feel a more honest biographer would acknowledge this fact and, being aware of it, let us know up front what their prejudice is, which will inform their interpretation. Mr Cate portrays a Nietzsche who is a reactionary conservative who thinks it a great shame we don't all speak Latin and Greek. But is this really Nietzsche, or is it (as I suspect, based on some rather unpleasant comments in the introduction) Mr Cate? We aren't told.
Other minor points which made me wonder just how well acquainted with the philosophical and literary world Mr Cate is. It is seldom one sees Lord Byron described as Scottish. It took me some while to work out that when Mr Cate wrote of Plato's 'Dinner Party' he meant the 'Symposium'. Similarly, Hesiod's great work is 'Works and Days', not (as Mr Cate has it) 'the Days'. Bracketing Shakespeare and Racine together in one literary pigeon-hold is inept. Oh yes, and a history of philosophy which raises Hegel on high and mentions Locke and Hume only in passing is so eccentric as to beggar belief. Putting all this together, one gets the feel of an author who doesn't really know his subject.