We really enjoyed our stay at the Hotel Beethoven. The location is very convenient (close to Karlsplatz U-bahn station, walkable to many things inside the Ring). The hotel staff were all very friendly, the all-day tea and coffee in a pleasant lounge were nice, we enjoyed the free Sunday concert (piano and cello), the museum passes that the hotel lends to guests were very useful, and the bar was a pleasant place for a drink at the end of the day. The owner takes care to give this hotel a special atmosphere.