AWESOME LOCATION!
Paul was great at communicating and the place is as described. It is a basic small one bedroom apartment, nothing fancy, but the location makes it! Out your window is a view of the action. Walk out the door and you are basically at the castle, the grass market and the royal mile. You can easily stop back for a rest or toilet break throughout your day.
The temperature of the shower was a bit tricky and it is tight for someone who is larger. Also be aware the flat is on the second floor so you will have to carry your luggage up the stairs.
If in Edinburgh again I wouldn't hesitate to stay here again.