We spent some great days in Edinburgh and also travelled to several cities around by train, and the apartment was in a great location for this, as it is only 15 minutes walk from the city centre (there is also a bus, but I recommend walking as Edinburgh is absolutely beautiful everywhere).
The apartment had all the basics for a great stay here and the hosts were really nice answering quickly and kindly our questions. We had all the facilities although we arrived late at night and we were allowed to leave our luggage some hours in the apartment before our flight, which was really helpful.