The apartment is great, really stylish with a nice home from home feel. The location is perfect to explore Edinburgh and has lots of bars, cafes, restaurants and shops within walking distance.
The only issue we had was with the traffic noise from the road when trying to sleep in the bedrooms at that side of the building. It's an old apartment with old windows that do little to block out any noise and the road is pretty busy throughout the night. If you are a light sleeper make sure to get the room at the back of the building. Also if you have an issue with stairs then this probably isnt the place for you either, they weren't a problem for us but coud imagine people travelling with elderly relatives or young kids could struggle.
Other than that I would absolutley recomend and we will happily book again the next time we are in Edinburgh.