Spoke with a cool guy at the Dublin Supercharger today (thanks Matt!) who was sitting in a Model S with "Tesla Mobile Service" on the side. I told him about a rattle I was having in what I think is the left rear door panel. He immediately came over to take a look, then offered to pull the panel and inspect for anything loose. We chatted while he worked, and I asked about the mobile service versus coming to the Dublin site. He said that Tesla was switching over to mobile service as the primary means of getting the car serviced versus bringing your car to the shop. In the not too distant future, you will need a good reason to not accept mobile service since that will be their preferred model. I mentioned my wife's Model 3 issue with the "phone as key", and he said it's a well known problem with androids, but that he has a fix he can try that has worked for many. He said I could just e-mail him and he'll swing by and take care of it when he has a chance in the next few days. Now that's service! I prefer the mobile service option, as I don't have to give up my car for an ICE loaner, and I don't have to drive out of my way to get something checked out, so I view this as a very positive improvement going forward.