I have a 2017 Golf wagon. 1.4 litre petrol (gasoline) engine with the 7-speed DSG transmission.
I have done about 65000 km and it has been fantastic. It is a really great car. The DSG transmission takes a little getting used to.
It has had one weird fault that hasn't been fixed - my car has the optional Driver Assistance Pack that included collision avoidance braking, self-parking and other stuff. Every so often as I pull into my garage, it shows "Parking Assistance Error - parking assistance has been turned off." But it has only ever happened in my own garage. VW dealer can't find any fault. They updated the car's software which improved its behaviour when the error occurs (it used to switch off all driver assist functions and they would have to be turned back on manually, but that doesn't happen any more.)
Despite this very minor irritant, I LOVE the car. Comfortable, great handling, amazingly economical (uses about the same fuel as my previous car, a Diesel Peugeot.) The VW has auto start-stop, where the car engine switches off every time you stop, even at the lights or at an intersection, and it quickly restarts when you take off. It works fine, I don't understand why so many people hate that function and switch it off (it can be disabled.)
Servicing costs are low, so far haven't had to replace any spare parts but before I bought the car, I compared parts prices against the other car I was considering, a Ford Mondeo Diesel wagon (Fusion in USA.) To my surprise the VW prices were MUCH cheaper than Ford prices. For the VW a tail light was $150, for the Ford, $750. I'm in Australia, relative prices may be different where you are.
When we were on holiday in the USA in 2015 we hired a car to drive from Las Vegas to Flagstaff AZ, via Hoover Dam and Grand Canyon. The price category car we hired was "Ford Focus or similar." We were hoping for a Focus, having hired them several times in New Zealand. We arrived to be offered the keys to what sounded like a "Hunday." Wasn't sure if she meant Honda or Hyundai. Turned out it was a Hyundai - I think Elantra?? I have driven them before and thought they were awful, so asked if they had anything else available? "Only a Judda." Turns out a "Judda" was a VW Jetta. Oooh, yes please. So we drove a Jetta for about a week. Apart from the steering wheel being on the wrong side, we loved it. Aggressive Las Vegas drivers - not so much.