I discovered these people by accident when having trouble with my car and unable to get to 'my' mechanic. I thought it would be expensive to have fixed but the man fixed it on the spot and refused payment! 'Just a little thing. No problem. Enjoy your day'.
They have been my mechanics ever since and never try to cheat me despite me having no clue about cars. I have found them to be much cheaper than other places.
I fortunately have the advantage of a sister who works for a mechanic so can get rough diagnoses and cost estimates. The man at ZK Auto always tells me the same thing and comes in at, or below, the same price I have been told - and he doesn't know I know this!
I LOVE them for their decency. It is hard to know whether you are being ripped off with something you know nothing about and I feel confident with them.