For those not used to Edinburgh, don't panic, the entrance/stairs never match the flats. Definitely not the poshest street in town, but Edinburgh is super safe, grotty facades mean very little.
The hosts were extremely accomodating, the flat is great, super-neat, bedrooms bigger than usual, proper shower (none of that electric Brit business), everything is there. A great plus: the bedrooms set to single or double on demand.