Carina is very helpful and quick to respond. The location is great as public transport is within 5 mins walking distance also it is not far at all to get to the city centre. There are a couple of restaurants and convenient store nearby if you need anything.
The only difficulty was the door system - security keypad is great and convenient however the door knob is stiff and difficult to open / close.
Other than that, the place is clean and spacious. It was just like the photographs shown. Thanks Carina for the stay, we had a great time in Vienna.