i am not sure what it is like in other regions of the US but on Cape Cod in Massachusetts, the built in navigation is not worth using. Proposed Routes are slower and less direct than either Apple or Google on the iPhone or the portable Tom Tom device. Cape Cod has many meandering roads allowing for optional ways to navigate but the Tesla app never does better than Google. We stopped using it on our recent vacation there. One example was a 30 minute trip on secondary roads. The Tesla app had us crossing Long Pond Road, making turns on other residential roads and finally turning on Long Pond Road. Other apps had us turn on Long Pond Road directly. In other cases, the Tesla app suggested exits off the mid-Cape highway (65mph) early. The other apps picked exits later down the road and shorter travel times. My questions are "is this just an East Coast issue?" or a general Tesla Navigation issue? I have a 2017 MS but have not seen a map or navigation update message.