Good location, next to the Rathaus u-bahn stop and easily walkable into the main centre of Vienna. The room was very comfortable, excellent shower, good bed, good wifi connection and plenty of towels supplied to cover our whole stay. The room entrance is via a garage which is open during the day and has key card access in the evenings. I didn't realise when I booked that the room is actually part of the Mercure hotel - just accessed from a different entrance. This means check in is easy as the reception is always manned and the room has standard hotel key card access. Really enjoyed our stay here, it was a great base to explore the city from.