We were very impressed by the quality of the apartmant, which was absolutely confortable for 6 persons. It was located in the absolute center of Madrid, with the metro 2 minutes and the Puerta del Sol 5 minutes by foot. The price was reasonable, especially compared to the prices offered for similar apartments.
We were very kindly received by Marta and here husband who even indicated us all the main signtseeings in Madrid.
The only thing to remenber is to beware the spanish taxi drivers who like to overcharge their clients.