Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: painful and obscure
Review: The mathematics of finance is not trivial, but neither is it really all that difficult; nevertheless, Duffie works to make you think that it is.I maintain a scale of good versus bad mathematics writing in my head, against which I calibrate books I read. This scale stretches from, at one end, the faculty of Moscow University, in particular Israel Gelfand, Vladimir Arnold and Andre Kolmogorov, all of whom manage to explain to me hard things so that they seem easy, to, at the other, Darrell Duffie.
