Naturally, because of the number of countries this book covers, it is far less detailed about any one country than Lonely Planet guides covering single countries or a smaller number of countries. Still, for my purposes--a 15-day motorcoach tour including Frankfurt, Berlin, Warsaw, Krakow, Budapest, Vienna, and Prague, with just a day and a half or so in each city--it proved adequate. Few people will have room enough in their carry-on or checked luggage to carry a book for each country visited during such a tour, so one is stuck with a single multi-country guidebook.
I don't understand why Lonely Planet included Switzerland and Slovenia in this book. If one is traveling to Krakow or Prague, one usually doesn't travel to Switzerland during the same trip.
My basis for comparison was the Lonely Planet guide to Belgium. Belgium's a small country and the guidebook covered just Belgium, so the editors had room for all kinds of fascinating descriptions and inset articles providing detail, such as several articles about beer styles, breweries, and top pubs, battlegrounds, and the scatalogical nicknames Belgians have for people of other cities. That was the best guidebook I've ever used.