I skimmed through a few pages of past reviews, and they are almost all excellent reviews w/ 5-star ratings.
There have been a few slip-ups though:
Jr J in May 2017 says, 1-star: This guy is a fucking asshole he wouldn't do my smog because my car was supposedly leaking oil which was just bullshit every time he had an excuse not to do my smog would not recommend going here go to the one on Euclid in Whittier Boulevard way nicer people than this fucken asshole and it's cheaper there.
Note: Jr J reportedly has zero friends.
David R in Jan 2017 says, 1-star: Different person working this morning. He was busy and quite agitated. He snaps at me tells me go wait inside and he'll be there in a minute. I chose to wait outside and asked if he was too busy and if I should come back later. "I told you to wait inside and I'll be with you as soon as I can!" Was his response. I knowledged him and told him that I wasn't deaf. That was it. The end of the conversation. I left and will probably never come back. So if you show up and there's a fellow with rather long hair in his late 40s early 50s, tread lightly because he can be a cranky bitch.