Callum's apartment was by far the best choice we could have made for this trip. Its excellent location, on the Royal Mile, close to both Edinburgh Castle and Hollyrood Palace, to countless bars and restaurants, and to the major tour companies, made it very easy for us to navigate Edinburgh and make the most of it.
We're been in constant communication since before our arrival, and throughout, Callum graciously answered all my questions and concerns in a very timely manner. The apartment is, moreover, spacious, comfortable, clean, and well supplied with everything one might need. One bedroom is facing the Royal Mile, so it may be a little noisy at times, but the other one faces the backyard and is very quiet. My only suggestion would be to either provide a plug adaptor for non-UK guests, or to warn them to bring one, in case phone batteries run out after a longer trip.
All in all, we could not have been happier with the place and with our host. Upon our next trip, we would gladly book with Callum again.