I just had my first barber SR shave. He was a youngish lad and was using a shavette to comply with health and safety regs.
prep was poor and he was surprised at how tough my beard was and went t brought three blades!
In short, I would not repeat that exercise, as I can do a better and more comfortable myself.
One thing I learned was that I have tough whiskers, which I sort of knew.
The other was just how sharp my pro honed SR's compared with a shavette.