Several dealer visits; the first to confirm that there was a TSB, and that they would do the work, but not right away. appointment set for a few days later for technician examination. I had no doubt they had never done one of these. Got a phone call a day or so later, saying that the inspection had to be postponed due to unavailability of technicians trained on EVs; another visit scheduled after the weekend (I took advantage the dealer's courtesy shuttle service for of all this back-and-forth.) After this, I got a call at home in the afternoon, saying that they had examined what had to be done, and did I want them to proceed; if so, the car would not be driveable, as they needed to order parts. I opted to wait until they could complete in one shot. They finished the job in the last visit, and I drove it home.
I think I've seen elsewhere on this forum thread that the work should take 4 to 5 hours billable shop time, but that assumes that the parts are in stock, and the trained manpower is available. Certainly not the case with mine.