This flat is gorgeous, comfortable, while being in a great location and a beautiful view. It was perfect for our trip. It would sleep 4 comfortably (2 on pull out couch) which was comfortable. The guide had everything you could need to know about how to run the apartment and the surrounding area. Close walk to everything in Old Town.
It's a 3 story walk up, and when in Edinburgh plan to do plenty of walking on cobblestones and hills, so if you have bad knees, I don't know that I would recommend this flat for someone who struggles with walking long distances.
The flat exceeded my expectation, and the host's team was prompt and nice. Recommend a stay here!