No appointment needed, got my van in the shop within about 5 minutes. I've got a '90 VW Camper and passing smog is always a bit of a crapshoot. Jaime heard a little hissing from the engine and took the time to look it over and found an ancient rubber vacuum hose that was starting to fall apart, and then another little cracked hose part where the leak was coming from, which probably explains my rough idle. The van still managed to pass, but now I know some problems I need to get fixed that will probably help the thing run better and save problems down the line. No other smog guy has ever taken the time or had the knowledge to do that. Also saw him take the time to explain some things and give some tips to the guy before me with an old Ferrari, that barely passed. Great to see somebody doing this job who is not just pushing buttons on the computer but actually has some helpful knowledge about the vehicles. Highly recommend, especially if you've got an older unique vehicle you're trying to keep running.