If you're going to Edinburgh for the main tourist attractions like Edinburgh castle and the royal mile, you won't find a better location. The castle is literally behind the flat and you are within walking distance of all the great places in the centre of the city.
The flat is also greatly furnished with 3 rooms each with a double bed, a stocked fridge so you don't have to worry about making a quick breakfast in the morning.
Cameron is also very responsive and friendly. As I've already told her, I'll be seeing if this flat is available first whenever I come to Edinburgh.