Very good location as a base for the city sightseeing. 3-4 minutes walking distance from U1, which means that it altogether takes 15 min to reach Stephanplatz or Karlsplatz stations. From there you catch U-bahns for other parts of the city (new rides from there may take from only few up to 20 minutes for the farest parts/city attractions). The building in which is the apartment is old one, hallway and stairs need to be renovated, but appartment we stayed in (number 10) was very nice - fully refurbished, well equiped, with new comforable furniture and enough slleping space for 4 of us (3 adults + a 14 years old child). Igor is a very good and helpful host, although we actually did not meet him, because there was not need - check in and check out was done without keys (there is an automatic lock, so Igor just provided us with a pin code), all other instructions/help I got quickly by email/phone (e.g. I was interested in parking place nearby and was a question about heating set up in apartment). All in all, fully recommended accomodation for stay in Vienna!