One could not ask for a better location. From the kitchen window there is a magnificent view of Edinburgh Castle, so close that you feel that you can touch it. There were 4 couples on this stay and we all had our own bedrooms. We never ran out of hot water.
Although we ate out for every meal, there is a fully equipped kitchen.
The building is just set off at the top of the Royal Mile so you have privacy from the tourists. For the 5 days that we were there, we were able to walk everywhere-Arthur's Seat, Parliament, Holyrood Palace, Queen's Gallery, Underground Vaults, Edinburgh Castle, etc.
The flat is actually part of the National Trust and is a piece of history itself.