I have used theoretically "premium" people before. Long history in the trade, well known name, pay extra for that and still get crap work and very little after sales support to fix their screw ups. The last house got a top of the line furnace installed by the best company I could find and they left it propped on isolation pads with the bottom 1" of the return open so it was drawing off the basement floor. They didnt feel like redoing ductwork to make it right. As with gatekeepers experience, the sales guy at the beginning talks about how he has been in the industry for 40 years and personally checks every job before the techs leave to ensure quality. Techs were there three times, I never saw sales guy after the contract was signed and the situation I described is how it was left after the 3rd visit (different techs every time).
I know a guy that wasn't getting the jobs he was quoting on, no matter how much he dropped his price. So he started doubling his prices and although he wasn't all that good he started getting the jobs.
People figured since he was really expensive he must be really good. And he drives an expensive pickup.