I am not a GPS expert and I have only used TomTom, Mio and Nagivon. Between the three, Nagivon 2100 impresses me the most. The user interface is intuitive; the 2D and 3D graphic maps are clean, simple and beautiful. The text-to-speech technology, which speaks the street names, is very helpful. The speed “caution” is also a nice feature to keep you on the limit. I bought the Nagivon last Black Friday for 99 dollars, which included the free lifetime traffic for the value of 99 dollars, and loving it ever since.