Great flat! Great location, Holyrood park and Palace are at 5-10 walking distance. I chose this flat specifically for the location as I like to start my mornings with a coffee and scone from the Holyrood Palace cafe and a walk in Holyrood park (which I highly recommend:) )
Walking distance to other great spots such as Calton Hill and Royal mile, and train station. Free parking on the street, you might not find it in front of the building but the street is long and you always find at least one space. Flat is spotless and very comfy, has everything you need in it, and communication with host was very good. Yes, it is in an old building and you could hear people on the corridor coming in and out of their flats but from my experience that is quite common in Edinburgh accommodations. However I never had a problem with noise during the night.
Sainsbury and Tesco are also very close in case you are on a budget and want to have some meals in.
Overall highly recommend it!