The appartment is right in the centre of Madrid and most of the sights of interest are within walking distance or you can go by the Metro. The neighbourhood is very lively - also at night - so you must expect to hear sounds and noise from the street.
There are two big, nice bedrooms with french doors that open towards the street. The sittingroom/diningroom is narrow, and if you want to sit four persons around the table, it is hardly possible.
Everything concerning kontact with Melvin, arrival and getting the key and instructions about the appartment worked very well.