The only problem I had with my 810 that I could not attribute to user error was a recurring loss of connection with my iPhone for Livetrack after Apple updated the phone OS. It took a few months but Garmin worked it out eventually with a firmware upgrade. I am very happy with mine. I have only used the mapping/routing feature a couple of times. On the bike it was fine, but their desktop computer software for creating routes has given me fits when it wanted to follow a route that a car would have to take rather than one a bicycle could take.