I spent a lot of time at the Tesla dealership trying to decide on interior colors. While doing so I noticed the following problems with the navigation system.
1. When specifying a location for a long drive, the system only gives turn by turn directions and does not show the route on the map. I was in the Menlo Park show room and this occurred trying to navigate to either LA, Reno or New York. I actually value the map route much more than the turn by turn details.
2. The system does not offer alternative routes like my Toyota Highlander. For example if I would like to drive to Death Valley or Las Vegas, I could go through Tehachapi or through LA. Or if trying to cross the San Francisco Bay, the best route really depends upon traffic conditions. I would like to be able to configure a through point or at a minimum be given a series of route options.
3. I could not find a single configuration button. I prefer to be able to configure items such as the voice of the person giving directions and the MPH estimate for driving distance estimate. I could not determine whether the time estimate was based upon actual traffic conditions or not.
The post on my blog has the photo of the missing route on the screen.