Mario is a very friendly host and he gave me all the information for a nice permanence in Edinburgh. He promptly solved an "overbooking problem" letting me stay in another apartment near this but bigger with no extra cost.
The apartment is clean, warm and very lovely... perfect! All rooms were spacious and fully furnished. Also, the location of the apartment is very good - the walk to the city centre takes only 15 minutes but there are a number of buses you can take. There is a huge Sainsbury's down the road, very useful during my stay.
Moreover it is not far from Arthur's Seat, a dormant volcano which you can walk to the top.
It was my first time using Airbnb and it could not get better. Overall a very good experience that I would surely recommend.