Pah, off-line map storage it may now have but Google Maps/Navigation still needs a data connection!
Gave Navfree a real word test today when I went for a 30km ride and asked it, at the half way point, to take me home. Worked fine - within the limitations of the map. Maps around here (openstreetmap) are not complete, so do not have the little communal roads (like d roads) which I like to ride. It tracks me across open space and when I rejoin a road it knows about, it recalcs the route and starts to direct again. I'd say that was a result personally. £60 well spent.