This is the perfect location for a family or group wanting to explore the heart of Edinburgh! We were only in town for a couple of days, and this apartment gave us quick access to all the major sites without wasting travel time. Five of us shared this apartment: myself, husband and toddler (the small extra room with the travel cot was perfect) and my parents, and there was plenty of room for everyone. There was even a high chair in the kitchen for my son to use and a basket of toys for him to play with--very thoughtful touches. We were unable to meet Andrew or Lucy in person, but check in was a breeze and communication was excellent!
A few things you might want to think about when considering this apartment: it's barely one street off the Royal Mile so there was a good bit of street noise early in the evenings and early in the mornings, and the floors are very creaky/noisy: probably not an ideal combination for a light sleeper.