Deckle detecting

Go to your bookshelf, assuming you have one, and pull out a hardcover book. Is the cut edge smooth? Try another until you spot rough-edged pages. Now ask yourself: does this book impress you more than others with trimmed pages, or does it seem defective? Some of Amazon’s customers clearly think think the latter, to judge by a note found on the bookseller’s pages for books with this “feature”.