I think the guys know their way around cars. What actually bothers me every time is how slow it goes. Seems everyone is rushing but the cars aren't moving. For just a regular oil change I waited 1.5 hours and I was told 30-40 minutes. Last time I had an APPOINTMENT, scheduled 3 days ahead. I came on time, my car was taken 1.5 hours later I was out of the shop after 3.5 hours. You should wait 15 minutes for the appointment and keep the open spot so when they show up, you take their car right away. If they don't, you can after 15 minutes take someone else's. Nobody can be mad if they were late but they will if they are on time and someone else's car is being taken care of.