This apartment was a truly great value, with three bedrooms for less than many two bedrooms. The location was really nice, walking distance to Princes Street and Old Town/the Royal Mile. I didn't have a good picture of the geography before going but it turned out to be a great area, with a nice selection of restaurants nearby as well as a Tesco Express (smallish but adequate supermarket).
The refrigerator is small, so might be a problem for larger groups who want to cook, but it was fine for us. Otherwise, the kitchen was well equipped. The beds were very comfortable and the towels nice and big.
The main negative was an unpleasant smell in the building (old building? drain problem?) but you couldn't smell it in the apartment. The kitchen also had a smell which I was told might be a drain problem, but fortunately it was reduced to a manageable degree by keeping the fan on. I admit I'm sensitive to odors but everyone in our group did note it.
Overall, though, a very nice experience. We loved Edinburgh and were happy to return to our flat at the end of a day out and about.