My wife and I use Chapman Hyundai Scottsdale for service of our old but well maintained 2006 Sonata and 2008 Tiburon. Lisa Baca is our go-to service representative point-of-contact. She's thorough and accommodating in following through with having whatever you need done service-wise to your vehicle. One time the Sonata's dreaded "check engine light" had turned on but just as mysteriously turned off, and with no apparent symptoms. Concerned, I made an appointment. Lisa took the time to have a basic diagnostic run at no cost to determine if there really was a problem because a more thorough diagnostic would be a hefty charge cost wise. Nothing showed on the basic diagnostic and no problems ever surfaced. Lisa's approached shows that Chapman is not just about charging their customers unnecessarily, which speaks highly of hers and the company's integrity.
I endorse Chapman for your Hyundai service and specifically to seek out Lisa as your service representative.