The cover frays and acquires "dog-ears" in a relatively short time of field use. In contrast, the Audubon field guides use a much more resilient plastic softcover. The pages smude easily from finger oils - remember, this is a guide you should be able to use for 8 years or so (until the next edition) so these are unacceptable shortcomings IMHO. By far the biggest gripe I have with this book, however, is the the choice of red to identify galaxies, star clusters etc in the atlas charts. These marks completely disappear under red light(!!!), making the charts useless for finding deep sky objects in the field. Finally, how are you supposed to operate equipment and keep the book open? Because it lacks spiral binding, the only way to use it hands-off is to put a weight on the page you're referencing.
If you're looking for a great reference to use at home, this guide is hard to beat - in fact, I highly recommend it. However, look elsewhere for more useful star charts with deep sky objects to use in the field.
But beyond that, there's plenty of valuable info about most of the "popular" objects and consolations, accompanied by excellent pictures. And there are some other astronomy related tips for newcomers, such as on purchasing a telescope or binocular, or photographing the stars. All in all, it's an enjoyable and valuable reading book in addition to it being a great field guide.
Great charts for finding stars. Thanks to this book I now understand how to find a star from a star chart. Great pictures, and again I cannot state how clearly they explain things.