Summary: I give good ratings because, this navition system can take you any place you want and calculate the rout in a matter of seconds. Before I bought my system I read a lot of reviews then I made my decision. I do not regret the purchase of that device and I recomend it to everyone.
Summary: I've had a chance to play with the Navigon 8100T and it seems to be a solid performer. Graphically speaking, it features a graphics accelerator that allows for almost smooth scrolling in 3D mode and even more smooth scrolling in 2D mode.
Summary: Although I loved the 8100t, I ended up returning it because I paid full retail price for it ($600). Right now Amazon is selling the 7200t for $250 and although I love the new 3D view and large 4.8" screen, I don't think it justifies the $350 premium.