A valet once left his e-cigarette in my Roadster. After I found it, I called the SC and kindly mentioned that it's probably not a good idea for that kind of product to be used anywhere near these cars. They apologized, spoke the to staff, and said the valet reported he was not using it in the car, but that it fell out of his pocket - which is certainly possible.
There were some earlier scheduling hiccups last year, but the SC in Phoenix-Scottsdale was moving from their temporary to permanent location at the time. Overall, I've been pretty happy with Tesla service.
Regarding the big surprise, I'm hoping for supercharging access but the technical difficulty of doing that has been discussed. I just think it would be pretty crappy, as recently rumored, if they opened up superchargers to other manufacturer's vehicles, but the Roadster is still left out of the party.
Regardless, I really love this car as is.