Ultimate honesty.
I've been a customer here before Steve even had his own business. I used to go to International Automotive back when Steve was just a mechanic at the company. I've been a customer for a very long time, and one of the most important things I find with the company is that they're honest.
I sent my stepdaughter over by herself, knowing that they would be truthful, honest, and look at her car. Steve never tries to make money off a customer. If there is any way he can cut costs to help a customer, he will definitely do it. He's down to earth, says it like it is, and I would trust him with and listen to what he says about any auto.
Also, I forgot to mention that the shop is immaculate. It's the cleanest shop I've ever seen, and everybody is organized. If they don't have a part in stock, they get it extremely fast, while you wait. And Steve's just a character, a really non-stop funny guy.