Not nearly as mathy as Mas-Colell, Whinston, and Green (MWG), and much more conversational in prose (for a microeconomic theorist, Varian is a great writer), I did find this textbook to be a great supplement to the primary materials in the core micro curriculum of my PhD program. I did find that Varian's explanation of the integrability problem - a way to solve the problem of deriving an expenditure function from observed consumer demand behavior - was better than MWG.