Jonathan and Kimi's place appears as advertised. Comfortable bed, amazing lighting, and good enough location to the trains to hop around Vienna or get to the airport. It is a hike into the center of town by foot from their location. My only complaints:
1. No air con or fan. It hit about 90 degrees while I was there and that was tough to sleep though.
2. Although not something the hosts can control, their next door neighbor was chain smoking right outside the front of the apartment almost the entire time I stayed there. The front of the apartment (kitchen, bathroom, shower) smells of smoke badly. I had to stay in the bedroom while I was in the apartment. Not atypical for European places, but if you're sensitive to smoke I might look for a hotel or different location.