My family and I travelled around 3 cities within the U.K. over 12 days and this was by far our favorite place to stay as four adults. The Kitchen was spacious and well equipped, the wifi was great throughout, the beds were very comfortable and the Living Room was particularly cozy with even a little Christmas tree since we were there over the holidays. It was the perfect place to explore Edinburgh by foot (though there is a hill to get to Old Town area, Katie told us about a bus that goes right up and is convenient). We enjoyed sitting around under the plaid wool blankets and drink tea/wine and chat on the afternoons/evenings we were not out enjoying the great local food. We loved the local Cumberland Pub is on the corner and everyone was very friendly.
Katie met us at the apartment and gave great recommendations in the neighborhood to eat, explore and the best place to watch the New Year's fireworks over Edinburgh Castle for Hogmanay. She is very in tune with the neighborhood and we even ran into each other at a yoga class at Tribe Yoga - which I would highly recommend!
We had a car for the last few days to make small day trips and it was not a problem since we were out during the days but there is payment for street parking required during work hours. There was never a problem finding a parking space and the free downloadable app for your phone makes the payment much easier.

We will definitely be coming back to Edinburgh and would absolutely stay at this flat again!