I've posted this in the Model X forum, but someone (appropriately) noted that I should ask Model S owners, who obviously constitute the largest group of people who could answer this question. So doing so now: Forgive me if there is a dedicated thread on this topic, but if there is I haven't found it. I've become so addicted to Waze that I tend to use it over a fairly good navigation system in my 535i and despite the fact this means I lose the nice heads up display (HUD) in my car. I read one post that notes that Tesla's rerouting approach uses Waze data, but my issue is that I have two primary routes home, and deciding between the two is really simplest with Waze. And I've also found it's predictive algorithm related to commute time keeps getting better, and is often frighteningly accurate. What I'd like to know from current Model S owners who are also Waze fans, is: How do you currently use Waze in your vehicles? That is, other than using your phone to effectively bypass the car's nav, which is what I'm doing now and frustrates me given the cost of my upgraded Nav and negation of the benefits of my HUD. I have a MX on order.