I just showed up at 335p on a Monday w/2 cars ahead of me, & including testing- I was on my way 9 min later! The technician was friendly, efficient, & even took time to answer a couple questions. For something nobody likes having to do, it was painless. The most inconvenient part of the whole thing was the traffic on my way there :)
PS- I think it's stupid that in AZ my 2009 vehicle w/28k miles on it needs to be tested every 2yrs at $20 a pop. But that's not this emissions center's fault....