I just upgraded from SA 2004 to SA 2007. The 07 version seems to run smoother, plus you can plan more than one trip on a single map. I use SA to plan trips, figure mileages and estimate cost, but I use a Tom Tom Go GPS on the road. They all have errors in them, but I still prefer to travel with a GPS over a paper map.
Tom & Carol - Ruger, our Silver Lab
2008 Monaco Monarch 30SF
2012 Jeep Wrangler