As p!xeldealer says above topo maps are not for door-to-door navigation but the search funtionality can be quite useful. Not very much when using the gps but when trying to find where small farms, lakes or other places are situated and using Mapsource it is handy. This is almost impossible to find even if you have some idea where to serch since details disappear quickly when zooming out in Mapsource.
The search functionality seems to be preserved even when using a map that has been "reverse engineered" from gmapsupp.img to Mapsource as the FriPro v2 Götaland is.