I spent there a week with my 16-year-old daughter . The hotel is ideally situated, right 'under' the castle where you can go late at night (until 11pm) when the tourists are all gone! Think about taking a taxi if you come from the airport because the metro is about 800 meters away and the street is really going up!
We had a very nice and clean duplex appartment under the roofs (3rd floor), we could have been 4! Yet if you walk all day long visiting the city, do ask for a room on the 1st or 2nd floor! There are no elevators and even if I'm not too old, I can assure you that that third floor was hard to reach after a whole day visiting Prague! above all because the last steep staircase from the 2nd to the 3rd floor!More