We stayed at Martin's lovely flat while in Edinburgh and had a wonderful. The location is perfect, as close to the Grassmarket and you could want to be, and right underneath the most beautiful views of the castle, but perfectly quiet at night.
Martin was an utterly charming host, very helpful and had simply thought of everything we could have needed, even down to the route from the tram stop to the location of the closest supermarket.
We couldn't recommend the place any more, it is impeccably clean and beautifully furnished, with everything you need for a great escape.. Even a jacuzzi after a long days exploring the city. We will definitely be returning.