Descriptive rather than diagnostic, this book feels a bit like a padded-out article (which it is). Easy to read and occasionally thought-provoking, it nevertheless left me feeling unsatisfied, and a cynical reviewer might note that the book feels like an apologia for GOOD TO GREAT, since many of the companies lauded in that classic stumbled and fell in the years following. This book will appeal to fans of Jim Collins, but I'd suggest reading the HBR article rather than the whole book. There's a great book to be written on this topic, but this one isn't it.