For a short trip, a good guide - fits into a handbag with clear maps. Enough information to fund initial visit to places of interest and restaurants etc well chosen. For more than a couple of days you would need a more comprehensive guide but this still useful for its portability. I downloaded a decent guide onto my kindle for hotel use and took the pocket guide out with me.
Bought this for a long weekend in Madrid and it was perfect. Excellent maps to help us get around, good ideas of things to do, places to visit etc. Didnt use some of the sections as we found our own places to eat etc, but i did refer to this guide alot during our stay.
This is an ideal , pocket-sized guide to Madrid but with a large street map and useful lists of places of interest, restaurants etc.. Easy to use and consult without obviously labelling yourself as a tourist!