For 10 days only, beginning today (November 20-30) Navigon's iPhone app, Mobile Navigator [iTunes link]will be on sale for U.S. $69.99 instead of $89.99 providing a $20.00 savings. In addition, Navigon's Traffic Live feature is also on sale for $14.99 instead of $24.99. Traffic Live is a one time charge, not a continuing cost.
That's a significant saving for this very popular app, and puts it under similar featured apps from TomTom ($99.99) and Magellan ($79.99).
In my tests of the Navigon app I have found it accurate, and it has a superior user interface that is easy to use. Of course you shouldn't be looking at it while you are driving, and the text to speech does an excellent job of helping you keep your eyes on the road.
The Live Traffic feature will route you around major traffic congestion and adjust your ETA times.
It's nice to see prices heading south on some of these GPS packages. Now you'll be able to head south (or north, or any direction really) for less money and with more features. Have a safe trip.