I own a 2017 Accent - bought brand new from this dealership. I have taken my car in twice for recommended oil changes, etc. It has 15,000 Kim's on it - all "in town" driving.
The first time I take it in - it took several hours for my service - I made an appointment and the service team took my car in 45 minutes after my appointment time. Excuses/reasons for the delay - lunch break. It just so happened on this Friday the dealership was bbqing burgers for the staff. Priority - seemed to be staff eating burgers over customers getting their car in for service on time.
Second time - I get a call from the service technician "our tech noticed that your air filter is dirty, would you like us to replace it?". So, I asked why when there is only 15,000km on the car. No response - other than to ask me again and tell me there is a 15% discount.
I googled "when should I replace my auto air filter". Angie's list identified this particular replacement as a "scam" watch out for that technicians like to use. Normally an air filter should be replaced between 15,000-30,000 miles (24,000-48,000kms).
Thus far, my experience with the service department has not been good.
Anyone can sell a car - it's the follow up service that is important.