I enjoyed staying at Deniss' apartment. The place is a very short walk from downtown Edinburgh, restaurants, and tourist attractions.
The apartment itself was clean, but it is an older building. The walls are thin and the floors are creaky, fortunately for me all the guests were respectful of quiet hours.
Deniss was very helpful in recommending restaurants to visit and was very friendly in general. Was very prompt in addressing any problems, and even went as far as to provide a local cell phone SIM card for my benefit.
Would definitely stay here again.