My wife and I stayed here for a week and really enjoyed this flat for several reasons.
The location is excellent for exploring Edinburgh. We walked to the castle in 5 min, the Museum of Scotland in less than 10 min, and Holyrood in about 20 min. The flat is about 15 min walk from Waverly or from the closest airport bus stop. There is a nice Sainsbury and lots of restaurants of various kinds within 10 min (and especially don't miss Mary's Milk Bar, just around the corner). Although not far from a number of pubs, the flat was very quiet.
Inside, it was very nice for two. The fireplace makes the front room very cozy, the bed was very comfortable, and the shower was amazing. The bed had nice linens, and many thick towels were provided.
Note that a third person could have slept on the couch but the table only has two chairs.
The kitchen was spacious and had pots, a grill pan, and many tools for cooking. Products provided were: Coffee, tea, milk, little boxes of cold breakfast cereal, salt and pepper, dish and dishwasher machine soap, and laundry soap. No oil, vinegar, paper towels, etc. There was no soap or other products in the bathroom, just paper.
The internet speed was 8mps down and 0.7mps up. This is good enough for streaming--which looked great on the huge TVs!--but not sufficient for video calls or file uploading. There was good signal in all rooms.
We would stay again.