First, my Hyundai has been the best car ever as far as upkeep. Have always used dealer services and been happy with any place I have been until now.
I called the dealer to make a 60000 mile service appt. on my 2013 Sonata that has not had a single issue since I owned it. Had trip planned to Kentucky, so seemed like due diligence. I left the dealership and noticed a periodic squeak on the drive home, but thought I must be imagining things. Took the car a week later on road trip and my husband diagnosed the sound immediately that hadn't existed before the "service". Then we return from the long weekend and 300 mile journey home, and the weather warmed up. Suddenly there is no air conditioning. It worked on the way to get the service, but not a week later.
Called the dealer on way home to ask for them for a new appt. to review their checked systems list, marked as OK. The service person told me that I would have to pay for the visit and "things happen".
End result, my husband banned me from going there and give them any more money. Went to local mom and pop shop. Said serpentine tensioners were worn (squeak sound) and the air conditioner was low. Both those were "checked" as good during my service. So the work that was actually needed was not noticed in a $500 service and I had to pay nearly the same to get repairs by someone else.
Suggestion, go to Mentor Hyundai, or someone else.