I have installed the GCN 2015.1 on my PC and compared it to the latest open source OSM generic routable and the Garmin CN maps are more than nine months behind. I live in Parklands, Cape Town. In my area for instance the link up road (Sandown road) to the N7 that was completed nine months ago does not show on the Garmin CN but are in detail on the open source maps. The open source maps might not be be complete for towns.
Hope the photos for the comparison will show as this is my first posting.
