I recently spent 1 night at Trystan's place. It is easy to get to, only a short walk from Waverley station and close the Royal Mile. Don't get fooled by the rather dilapidated entrance hall of the building, you will be most pleasantly surprised by the awesome, spacious flat on the first floor. "My room" was large, airy and cosy - a comfortable and nice place to spent the night for sure. I didn't meet Trystan in person, we communicated via email and he always responded quickly.