I write just about the same thing for every Rough Guide, because, even though it seems to be in decline, that guidebook series remains the most reliable, the most informative, overall the best series I have ever used when I travel.
France is no exception, in fact it's better written than most - and that's saying something, in my book. I visited at least 12 cities on my last trip and learned something new about each one. If you're looking for a detailed travel book, filled not with pictures (don't you see the era things when you're there?) go with this series!