This is a useful map. Two sided, one side is a streetmap of Funchal, size 40cm x 60cm, with all districts and the major roads named. It marks all the town bus routes and their terminuses. There is also a table showing details of their routes, and notes about bus services, etiquette, frequency... It would not be a substitute for a tourists plan of the very centre of Funchal, (though you can pick these up free everywhere).
The other side is a map of the island, 50cm x 80cm, scale 1:60,000, 5cm=3km, showing roads, contours, tourist information, a place-name index, plus details of the across-island bus routes, with timetable information for some routes. It would be a good map for someone touring the island.. though David Brawn's Tour & Trail map is at a larger scale and so can show more detail. I was glad I bought both maps before I went, as maps on sale in tourist shops were often much dearer than the price I paid on Amazon.