Eva's apartment is a treat. Although it is not quite in the city centre (a 20 minute walk to Waverley station or St. Giles Cathedral), it is really well located in a quiet place. You can find your way to Arthur's Seat, Holyroodhouse Palace or a local Sainsburry's easily. The place is perfect for a couple and provides the amenities needed during a holiday week(end) in Edinburgh. Eva is very nice and helpful, always willing to give some tips on the city in particular or Scotland in general.
If back in Edinburgh, it is definitely the place to stay.