Summary: I guess I should have done more research before I bought this one. When I got this I was happy but when I actually took it out on a testdrive it was one of the worst experiences I have had with a GPS. The screen is very small and for some reason I did not feel safe using this.
Summary: Back then I bought the Navigon 5100 after buying a cheap Tom Tom. It was OK while I had the device. The Navigon had a easy to use touchscreen, buttons, and maps. But the directions were poor and re-calculating when you miss a turn or run into traffic would lead to all kinds of problems.
Summary: ...... if you need ANY kind of support for this product, do not even think that you will speak to a human being. they want you to go to their website and "someone will get back to you within 48 hours!" FORTYEIGHT HOURS?
Summary: I bought my Navigon a little over a year ago. Its performance has been mixed, in line with much of the reviews here. However, I can now unequivocally state that you should NOT buy this product.
Summary: This unit worked fine - my new TomTom 1 (the cheapest) is easier to use but lacks the traffic and text-to-speech - until it broke. I had been using it for 6 months, placed it on the floor, and it never turned on again.
Summary: This GPS is horrible. The GPS told me to make a U-turn in the middle of the highway. It also takes it forever to get good reception. On top of all this Navigon customer support sucks. You can only receive support through email.
Summary: I bought the Navigon 5100 for the lifetime traffic feature. It works, up to a point, but the antenna is very cumbersome and it is absolutely required as there is no traffic reception in my area without it. Many others mentioned the weak speaker volume, and it is indeed a problem.