Ross's apartment is great. Thee large rooms, kitchen, and bathroom separated from the shower room.
It is centrally located in the old part of Edinburgh. We were there for the Fringe festival, and even tough the apartment was in the middle of the event, it was quiet at night.
We used everything: wi-fi, oven, kitchen, wash-machine and dryer. Everything worked as expected.
The apartment was clean, so were towels and bedding.
The apartment has carpets in all room. I thought this would be a problem for my allergies, but it wasn't.
There are some books available in all rooms. There is one black book in the back room titled "Scots kitchen". Look for the "Haggis" recipe on page 157, then go try the Haggis in some of the local restaurants and fast food restaurants to get an idea of the traditional Scottish cuisine.