We had two nights in Edinburgh and thoroughly enjoyed our accommodation. We were about a 10 minute walk from the Royal Mile and a similar distance to Grass Market.
The apartment comfortably fit all four of us, two in the bedroom and two on the sofa. Excellent shower, kitchen and washing facilities too.
I'd also highly recommend reading The Unlikely Pilgrimage of Harold Fry, which you'll find in the bookshelf. I got up at 4am the day we were leaving just so I could finish it!
Would definitely stay here again.