I got my first COVID vaccine yesterday. The process was really streamlined. First, you book a time from the website (you could book both times at the same time).
A suggestion was to arrive at the vaccination site as close to your designated time slot as possible. I was actually ten minutes early, but it didn't seem to matter. I checked in and was directed at the end of (really short) line. In no time I was called in to one of the room where the vaccination happened. After a couple of standard questions I was already rolling up my sleeve.
After getting the shot there was a mandatory 15 minute wait period in another room with roughly 10 others, with appropriate distance to each other. After that I just walked out and that was it. All in all it took less than 20 minutes. Really well organized indeed.
It's been over 24 hours now and I haven't had any side effect or reactions from it. Even the shot area didn't have any soreness which is the most common symptom and almost expected.