There’s been a lot of complaining on the forums about changes to Tesla service. I admit it’s disconcerting to make a service request through the app, you don’t get to discuss what the problem might be or receive any other feedback. I recently went through the process twice and was happy both times. Our Model S had a slow coolant leak. I made the request through the app and received a service appointment at the local center. Before I went a service technician had read the vehicles logs, remotely diagnosed it and made sure the likely parts (4 way valve) were in stock. They fixed it fast and were friendly, reasonable and competent. While the S was being serviced they let me know the hardware 3.0 FSD computer was available for our Model 3. Again used the app and a few days later a friendly and competent mobile technician took care of it in my garage. Communication just before, during and after the service was great.