I've walked a few times, I told them at 15 minute mark I leave. They've called me at 20 mins and I said too bad I am already driving away.
The problem isn't customers being late, because late customers lose "their time" for being late. Anytime I've been late the girl has cut my time short and I am forced be out the door. Example my appointment is 1:00, I get there at 1:10. The session ends at 1:55. I don't get to leave at 2:10. Nor do I expect to.
So if they are late, it is the Po and the girls who are running late, due to scheduling too tight, or they wanting to make calls home etc. So I don't want to lose time because it is their fault.
What angers me is when they say you are too early. Like 20 mins. Seriously me early is better than me late.