This is a beautiful, sumptuous book, crammed with detail and excellent colour reproductions. Other readers mightn't go for all the technical information but I can't get enough of it. I also prefer the discussions of individual works which occupy a large part of this volume -- its companion, 'Dürer to Veronese', takes a more synoptic view, which tends to obscure the fact that these are surveys of a collection.
That's my only quibble, and it isn't really with the book, which is about as accomplished at it could be -- so good, in fact, that it's tempting to read it as a textbook of the whole period. Much of the material is of general relevance, of course; but don't forget that many of the major works from this period aren't in galleries at all: they're still in the places they were meant to be.