This is my go-to hotel in Oslo as the beds are so comfy. BUT on this occasion, the (Superior) room they gave me was tiny (with a large bathroom, not so useful), it was down some stairs, which is not great when one has a bad back but the really horrible thing this time was the stench of 'rotten cabbage/sewage' in the hallway outside the room. Awful, but apparently it was due to the kitchen cleaning something. But why not put guests in other corridors then? The ones I walked through to get to the lift were fine. Will have to rethink next time I go to Oslo.