We arrived in Vienna late on Friday night for a weekend stay and were a bit worried about the check-in. However, the instruction that were left by Uliana were so clear and precise that we had absolutely no problems getting the keys and entering the apartment. The location is very central, with just couple of minutes away from the transport and shops. The only word of caution for the weekend travelers: if you would like to get a taxi, ask the office, which is open on weekends - they are very helpful and will order your taxi right away. It was a bit hard for us to get a cab on Sunday.
The property itself was super clean and very pleasant. would definitely recommend to our friends.