The tom tom one is not a bad GPS overall but when you need it most that is when it will fail. There has been numerous times that we have entered an address and when it calculates the route it will say routing error. Or if you have a destination in and you are coming upon an important area for an intersection or ramp it will just go blank, leaves you hanging for about 5-10 mins because it has to reboot itself. That is really annoying when it happens. I travel all over the US and use it daily it will also take you to a different place at times especially when it is a newer subdivision or industrial...read full review »