Rebecca's flat is really gorgeous! We stayed in and cooked most nights (small child) and the kitchen was great. Living/dining space was a bit noisy with the road outside but that's just the single pane windows. It was very quiet in the bedrooms. Great location near castle and city attractions. Parking a bit of a pain - on street parking around with max 4 hr stay. We managed to find a good solution through Parkopedia (£18 for 24hrs) nearby.
Don't be out off by the slightly scary (authentic Edinburgh) hallway on arrival.