From experience on our trip to Tuscany:
Pluses:
- almost every significant museum and church is described on a room-by-room (or chapel-by-chapel) basis, which makes a huge difference given the information provided by most museums is scanty at best. For that alone, the book gets 4 stars.
- the practical information on public transport, opening times is very detailed and seemed to be pretty much all still correct.
- the language section at the back was considerably more helpful than the Berlitz phrase book I took along.
Minuses:
- although there is a colour section of 27 'highlights' at the front, there is very little attempt to give even a subjective list of highlights for each of the major towns. Maybe Rough Guides try to leave that kind of thing to the more didactic guide books, but in Tuscany plenty of towns have more to see than some small countries. And given the text consists mainly of picture-less descriptions of the inside of museums (see above), it isn't easy work deciding what to see without wading through the whole lot.
- we found that the restaurant reviews picked out places that were adequate at best, we did much better (and much worse) when we went off-book