Kathryn was not able to meet us but she provided a friend of her to welcome us in the apartment. The apartment is very nice, I must say it is even better than it looks in the photos. It is cosy and warm, nicely furnished and decorated, very clean, comfortable beds, bathroom new and very nice and good internet. We were two, but we had our sons over for dinner several times, so I can say that it would be perfect for 4 people as well, as it is quite spacious and confortable. The location for us was perfect, 15 minutes walk from Princes St. or Grassmarket and Old Town, quiet street but very close to shops and nice places like Union Canal and Morrison St., very close to Haymarket rail station and all kind of transportation to and from the airport. I strongly recommend it for staying in Edinburgh.