I love the Michelin Green Guides, and think that whilst the more recent newcomers, such as Lonely Planet or Rough Guides, have given great competition, I find that the Green Guides have improved just enough to stay ahead. I love them above all for the historic and cultural detail, combined with walking tours of the most important sites, together with useful maps. The newcomers (Rough and LP) are more like having a knowledgeable companion talk you round, including information on social activities (which of course becomes out of date faster), whilst the Green Guides are like having a professional guide lead you round. More facts, less adjectives. I personally like this factual style, and the Provence book is no exception.