Changes route without notification. This happened many times to myself and the others in our convoy, causing many detours on nightmare backroads. You must configure multiple stops with each stop being exact points along your itenerary, and do not clear the passed stops until you are miles past them (ignoring its directions to u-turn). Also, the app desperately tries to send you through Chicago, even causing additional time to drive pointlessly through the city. It is an infuriating mystery.