Charlotte was waiting to welcome us when we arrived. Our flight had been delayed, but it had been easy to contact Charlotte about this, and arrange a new arrival time.
The apartment turned out to be everything and more than we had expected. It was very comfortable and clean, and contained a wide variety of useful small things such as adaptor plugs, sewing kit, spices, and more, all of which were greatly appreciated. It was also very conveniently positioned, within walking distance of most Edinburgh attractions, and close to the railway station and tram stop. So it was very easy to pop "home" for a short rest during the day, before heading out again.
We thoroughly enjoyed our stay in Charlotte's apartment, and would stay there again if we visit Edinburgh again in the future.