Very clear, straightforward presentation of GR in the spirit of Einstein and also Schrödinger, easy to read. But also too easy to miss the main points of the physics/geometry (see Misner, Thorne, and Wheeler) while becoming an expert at manipulating tensors in general coordinate systems. Very nice presentation of parallel transport and Weyl's formulation of gauge transformations. Better, more recent treatments using awareness of Lie algebras show the connection of curvature with noncommuting translations/operators, and emphasize the importance of relativistic invariance and local coordinate systems (physics). Einstein wrote of general covariance as if it would be a physical principle (it isn't), and this confusion wasn't cleared up for a long time.