We stayed 7 nights in mid-August 2011. Found the hotel pleasant and clean, with some character and interesting details. It's very well situated on a charming street, near many lovely sights and close to subway and trams 1 and 2.
My main concern had been that there is no air conditioning, but we were fine because our room faced the next door building and not the sunny courtyard. That's what I would ask for in the future if staying in summertime. Also, the room was very large, with a high ceiling and tall windows, so not stuffy at all -- quite nice actually. Really liked the lacquered parquet floor and roomy wardrobe with many hangers, small safe and a mini refrigerator. Bathroom was new and spotlessly clean.
The Wi-Fi in lobby is free and there is a computer there that can be used free of charge. Use of in-room Wi-Fi costs 8€/day.
Included breakfast was ordinary -- fresh breads and cold cuts were fine, coffee okay and diluted "juices" terrible.
Just down the street (at Fleischmarkt 16) there is a café Diglas Konditorei that serves gorgeous Viennese desserts and coffees, and has a delightful, cosy interior.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC