Trust is always important, especially when you are working with your mechanic. The guys at Hagins have earned my trust repeatedly. My trailblazer was falling apart at 85K, having been maintenanced at the dealer for its existence. Looking at not being able to smog check due to a check perpetual check engine light, I gave Hagins a try. They fixed the problem, and 30K later, the same car is driving like new and I expect it to be around for years to come.