Iain's place was a great location! We walked to the castle and many Fringe locations as well as touring High Street and Grassmarket. The hop on/off buses leave from just a block or two away so if you don't want to walk as much. Great cafes on the street too. It is 48 steps up from the street, and remarkable quiet considering how much is going on in the neighborhood. You can even watch the fireworks above the rooftops.