This is a wonderful apartment in the middle of everything without being loud -- except for construction starting a little early for us on a couple of days. The location allowed us to walk pretty much everywhere. Note that it's on the second floor and there's no elevator, so be prepared to carry your own luggage upstairs.
The beds in both bedrooms were super comfortable, and having twin beds in the second bedroom was perfect for our family. There were also thick "blackout" drapes which made sleeping in, and adjusting to the time change, easer. Both bathrooms were modern and clean and since there's hot water on demand, it meant 4 showers in a row were possible without worry. We never turned on the TV but relaxed in the purple living room nightly.
If our travels take us to Edinburgh again, we will definitely stay there again!