I bought a single and thought it was great when I was offered an upgrade to a twin. However accepting the upgrade was the worst mistake. My room was in the basement, people were smoking and talking outside my window until the early hours making the room stink and depriving me of sleep. The walls and doors were paper thin and It was also by some sort of staff area and the breakfast room - so from late night until the moment I left I heard talking, coughing, shouting, clinking. All I’m all quite a terrible experience.