This was beyond a doubt, the best place we've ever stayed in the UK. It was clean, comfortable, and in the absolute heart of the Royal Mile. You can walk to every attraction. Our hostess was very thoughtful and exceedingly detail oriented in making our stay as comfortable as it could be. It may sound like I'm using a lot of superlatives in this review; this is intentional.
Also, it appears the flat has been recently renovated, plenty of hot water and all the creature comforts of a new flat but the charm of an ol older home.
This is not a critique, just a fact when staying in a very old city: the flat is not wheelchair accessible, so keep that in mind if you live with any disabilities. But, to be fair... also keep that in mind when planning to visit Edinburgh.
We would absolutely stay here again if the flat was available.