We had a wonderful stay here. The apartment is within walking distance to most major sights. Hundertwasser Village is only 5 minutes away, as well as Prater Park. Other sights are 15 to 20 minutes walking distance. There are a few supermarkets within minutes too.
We arrived by bus and took the metro which was very easy. The nearest metro stop is a few blocks away. We left the city by train and took a tram directly to the train station--the stop was 2 minutes from the apartment. If you arrive by plane, the apartment is very close to the airport express train stop.
We found the apartment to meet our needs quite well. It is pretty spacious (we are a family of 4), so we didn't feel like we were on top of each other all the time. The kitchen is well stocked. We cooked several meals and had everything we needed. There is a lot of storage space too.
We highly recommend!!