Hiya! I'm new to the forum and I just ordered my Model 3 today!! I'm looking at the manual and accessories, and I see the Key Fob. How useful is it? Seems like I can do everything with my phone. Maybe it's good for valet parking or lending the car to a friend? Or is it just personal preference? Just wondering if some of you experts out that could give me some scenarios where the Key Fob makes sense. Thanks!