Dan's apartment is a great place to visit Vienna. Just 5-10 minutes walking from the center (St. Stephen Cathedral) and 10-15 from the Opera. You can find a two supermarkets about 2 blocks away and very nice places to eat or have breakfast about 1 or 2 blocks away. The apartment is very well furnished, well lit and confortable. Even though it is a little small the space is used perfectly and it was a great place to stay for visiting Vienna for my girlfriend and me.