I highly recommend the apartment at Chris if you travel to Vienna! The place is cozy and really nice, perfect for a couple! It was very clean, with all the necessities (towels, dishes, soap). The bed was soft and comfortable.
The location is very convenient: 1 min to metro station, several stations from the old town.
Chris is a super hospital owner, he was in touch all the time before our arrival and during all the staying. He took care about small details: prepared several city and metro maps, explained where to eat and where to hang out, how to get a taxi to the airport.
I really enjoyed my trip to wonderful Vienna and was very happy about the place of staying!