Had a very enjoyable stay. The place is clean and comfy, kitchen is well equipped with all the basics, there's an abundance of closet space, plentiful light, well-working heating, and the living room couch is quite lovely for someone like me who spends half her life glued to a laptop for remote work purposes but would rather not always sit at a desk (although the desk was good, too).
The bathtub is very comfy and spacious (at least by US standards) which makes it lovely to relax submerged in bubbles with a podcast at the end of a long day.
The building is steps away from the tram lines that run very frequently, making it a breeze to get around Vienna without a car/bike/etc.
The short walk to Schonbrunn and its vast and well-manicured park surroundings are ideal for a morning walk/run (makes me want to come back again in the spring/summer when all i in bloom)
Props to Oliver for being a great host with excellent/prompt communication.
Looking forward to repeat visits.