Tripmaster certainly gives these units a great deal of flexibility! Awesome program. I am experiencing a freeze of the 720 when I exit the TM app back to the navigation screen. The map locks up and does not reflect the movement of my vehicle. Turning the unit off and then back on gives functionality again, but the route is lost and I have to start the Navigate To function over. Anyone else having this trouble?? It does not seem to lock up when TM is just minimized, just when the app is stopped, and it doesn't happen every time...