Had a lovely stay at the place! We were here for 3 nights and had a seamless experience. The host arranged for us to check in slightly early and check out slightly later at short notice to accommodate us which was lovely. The house was spacious and cozy and very comfortable for 4 adults. The kitchen was stocked up with amenities and we did use it to cook up a bit of breakfast and packable lunch (Tupperware was provided). There were even cozy slippers for our use! :) The beds are quite comfortable (although quite a soft mattress which is not really my preference but this is taste dependant).
We visited during August when the fringe festival was in full swing and the flat was admittedly a bit far from the center of town but we knew that prior to booking. It was a 25-minute walk from the main city center (or a quick 5 - 10 minute uber which cost around 6-12 pounds depending on rain). However, this was not necessarily a bad thing as it was nice to get away from the madness of the city center at night and be in a quiet, restful place. The elevator was broken after the first day but the host was quick to respond and get in touch with the building to have it fixed - this was a minor inconvenience and not really in her hands.
Would definitely recommend to friends and family and would stay here again on a visit to Edinburgh!