GPSApp has just been broken, actually.
I should update the FAQ with this.
The web site that the python scripts were dependent upon,
www.mapsonus.com , just changed their format and now you can't get the detailed map data screen-scraped from their web page any more.
So GPSApp is no longer useful until we find another solution.
Anyone got any solutions?
And to answer your specific question, GPSapp on the empeg looks nothing at all like any commercial GPS units. It's made for a tiny mononchrome screen, shows only your route as a single line (not all the streets around it) (and nobody go bringing up roadmap because that can't do both at the same time and have them line up) and requires the routes be pre-loaded ahead of time. However, when it worked, it was very useful if you only had the empeg in the dash.