Indeed. The MapSource Windows app shipped with their GPS units is an abomination - awful usability packed into a 1996-era UI that looks two notches above an MFC tutorial. The map interaction is modal - you have to switch tools to choose whether you want to pan or zoom! And the logic for road labeling leaves plenty of room for ambiguity - the labels aren't rendered along a path, but are rather in straight lines at some randomly chosen tangent to the road, and sparsely enough that you have to guess that roads near one edge of the screen still have the same names they had on the other side.

The built-in updating mechanism has never worked for me - it helpfully indicates that the update "is estimated to take 3 hour(s), 38 minute(s) to download on a 56k modem". A 56k modem, for a piece of software bought in 2009, whose About box indicates a copyright of 2008.