The location of this flat is perfect--right by Grassmarket, Victoria Street, and not too far from the Royal Mile. I only had a day and a half in the city so I appreciated this amazing location!
However, the flat was not in ideal shape when I got there. While most of the flat was clean, there was some black hair on the floor of the main room and some sticky liquid dried to the floor by the couch. The flat had a musty smell and the bed was a bit uncomfortable. Nothing was terrible, just not great.
It was also hard for me to find this flat when I first arrived. My GPS kept taking me to a back alley location rather than the front. Make sure to confirm location with the host before arriving.
For the price and location, I'd still say this flat is a good value for a quick trip in Edinburgh, especially if you're planning to be out for most of the day like I was!