I ordered it and heres the details (the brochure they send doesnt really say this)
1. the first update is "free".
2. they update every 6-9 mos.
3. you can order the next update for their price (~125 or so w/ s&h)
4. I dont know if the current discs have this, but the new ones have "route USA" data that incorporates data about major US highways, so if youre outside your area you will still get map data and even reststop/gas station data on major US routes (eg I95).
5. I called them and they were very friendly and helpful (I didnt know the first disc from them was free)
ME