This is an amazing place to stay. Most tourist sites are walkable and if you have run low on energy or just have too many things planned to take the scenic route there are bus stops to most of the main lines within 3 minutes of the flat. The space is small but not cramped; the living space and bedroom are very comfortable, the bathroom and kitchen a little tighter but still functional.
I cannot recommend this place more, if I make it back to Edinburgh I will absolutely be seeking out this same flat.