Last Saturday I used the mobile app to set up an appointment to get my FSD 3.0 computer installed.
The first available slot in Bellevue, WA was for this Tuesday (yesterday).
I dropped it off at 2pm on Tuesday. They texted me a link beforehand; when I arrived, I clicked the link to let them know I had arrived.
They called me 15 seconds later, and came out to grab the key to my car. I had my wife pick me up because she wasn't doing anything anyway; but they offered Uber credits and it looked like they had several loaner Model S in the lot.
At 6:30pm I got a text saying my car was ready, and I could pick it up at any time on Weds.
I picked it up at 11:30 today, same process as dropping it off (except there was a few minute wait).
Our phones had to be re-paired to the car afterwards (I am not sure why).
Autopilot cameras said they were calibrated and ready to go after driving about 6 miles.
It was a great, fast, easy experience.
Nov 2018 Model 3, VIN 83xxx