I normally do not write review , but I have to this time to warn other from make the mistake I do ! when I first receive the 540tm I have a issue with the promotional code for the lifetime map feature . every time I enter it , I receive a error message say the code be already in use . after 6 email back and forth with customer support and send they copy of the promotional code and proof of purchase , they grant I lifetime map access to my account . I be then instruct to update the map on the unit , which cause the unit to reboot randomly while in use . then they have I format the unit and reinstall all the software again . this time the unit would not store the default setting because of a file access error and I have to create a rma with TomTom . I just receive a new 540tm back from they and the touch screen do not respond , which render it useless . I create another ticket with they , but have not hear back in over 24 hour . Hope this help those on the fence decide whether or not to purchase this gp . I will never purchase another TomTom product again !