I registered with ExpatVac the day it was spun up. No response from them, but BCCT kicked the tires for me just this Monday and I got my first AZ jab this afternoon at SCG Bang Sue. There were thousands there, all under various different schemes; ExpatVac/BCCT, BMA, and others whose names I did not catch while waiting for the overworked security guard to tell me where to go.
The entire process, front door to getting a cab home, took me 75 minutes. I very much doubt that the Thais waiting in the BMA queue got processed that fast. Were the performance slower today, I'd still be grateful for it taking place. It could be argued I should not have had to wait so long to be registered - all registrations accepted and sorted by age rather than there being a Thai queue and a non-Thai queue. However, at the end of the day, the machine is oiled and working and the volume of people through it seems to be rising. The staff I talked to said they were processing more people per day each day.
Ironically I received a mail from MedPark this morning offering me Pfizer yesterday or today. Not sure how that would work, but as I live close to Bang Sue I took the AZ and will wait until Nov 19 to get my second jab. I am not considering a self-diagnosed mix-n-match at this time, although preliminary tests suggest the two combine well. (https://www.pharmaceutical-technology.com/features/covid-19-vaccine-mixing-astrazeneca-pfizer/) It is unclear about getting a certificate here if one mixes vaccines.