The apartment is just as described and is very spacious and well-lit. Checking in is a breeze and there's everything you need to hand. I felt very at home here.
The location is excellent. I stayed for 6 days and found it perfect to walk into the city centre (about 30 minutes), but there's also a U-Bahn station about 5 min walk away for quicker access and other buses and trams nearby. It was also about 25 mins from the airport on the S7 (which is cheaper than the CAT train) and was easy to find. There are several supermarkets and shops nearby which Karl outlines in his guide alongside all the info you need about the Airbnb.
Karl was always prompt to reply to my messages and I felt very welcome. I would recommend this Airbnb and would stay again if I ever come back to Vienna.