Eva's place is accurately described: spacious, well-equipped and conveniently situated.
Eva was flexible to meet our needs on checking in and out and the apartment was very much to our liking and, importantly, warm (it was c.-10 outdoors when we arrived!) The apartment itself has a very spacious living area and is ideally suited to couples.
In terms of location, there are tram and underground stations very nearby but we walked almost everywhere - many of the major tourist attractions in Vienna are within a 5-10 minute walk.
Overall, very enjoyable and I would certainly stay here again.