I always tries to be early for my appointment, so that the early turn-up could gives a better first-impression of my organisation. I do expect people could tolerate on 5-10minutes of being late. However, it really pissed me off when I was made to wait more than an hour for no apparent/declared reasons!
Appointment at 1030am, am here at waiting lounge at 1015am, and I'm still here at the very same waiting lounge, same chair by 1130am. Darn!!!