The apartment is excellent and the location is ideal for the festival. We even got a good view of the Tattoo fireworks and the military bands parading out of the castle.
The beds are comfortable and kitchen is very well appointed. Emily had brought in breakfast cereals, bread, butter, milk etc, so we didn't need to do a "big shop" as soon as we arrived. Also, she could not have been more helpful and was very responsive to our contacts by text, email and telephone.
Parking is limited in Edinburgh (central) and very expensive, especially during the festival (£25+ per 24 hours). However, the apartment is so well located that you don't need a car to see the city and it is cost effective to park in a residential area with no parking restrictions (we parked just beyond the Botanical Gardens) and get a taxi back to the city. Even with the taxi fares this saved us over £100!