I had a Navigon portable GPS that I used for several years until it could not be upgraded any longer. Since I had had such good luck with that unit, I stayed with Navigon and bought this unit. I am just as pleased with this as I was with my other. It is easy to program and use, see, hear, and it provides a lot of additional information about road work, mileage, MPH, etc. that is very helpful when you have no idea where you're going! I use it for travel in areas I'm unfamiliar with so that is how I'm rating it, rather than around town. Map Quality & Accuracy Except for telling me to turn the wrong way on a one-way street, it has been perfect. Even then, it corrected itself immediately.