Only takes 2 minutes because it shouldn't take any longer. Asked about using a coupon online and his response was no, it has to be printed and it's only $4 more anyway. Uhh, okay. Well I'm obviously trying to get the best price here, there are smog stations on every corner. Even checked in and he said no. I'd say go somewhere else where they don't make you feel bad about asking to use a coupon you found online on their website. $22 cash or $23 if you use a card.