A couple of us have documented our time at PHR on this thread:
https://www.susans.org/forums/index.php/topic,244758.0.html My pictures seem to have expired, so the quick summary is:
Here is the end of day 1 of 2.

Here is the end of the second day, 33 hours of electrolysis later.

I would say it was a week before I thought my face was presentable, and nearly two weeks for the swelling to subside.
Here is the day after the second two day session. 20 something hours of electrolysis. You can see this was not a big deal. I went to work in front of customers the day after this picture.

And, here is the end of the 1 day session the third time around. 15 hours or so, I think. I did not go work the day after, but I could have.

And as others have said, your mileage will vary. Almost, all of my pictures and the experience of others cannot predict your situation. So, if possible, I would recommend having at least a week after your session, at least the first time. You will know much better how YOU will respond after the first time...
HTH,
Katie