i worked some time with them and it seems that everyone loved the navigon, you get alot more for your money.
only thing i will say for any GPS regardless of the model. make sure if you have any issues with them just push the reset button (usually need a paperclip to push them) and they will be fine. i cannot tell you how many times people would come in and say their GPS doesn't work right and we would just reset them and send them on their way.
persoannly i have a Magellan dont remember the model and i like it alot, (retail was close to 400) i got it on clearance so the deal wasn't bad
seems anyone that is in the knowlage of the GPS usally says get a Magellan, Garmin, and some say tom tom but they supposedly are not up to date as most.