Everything about this apartment was fantastic - the facilities, the welcome pack and the location. We stayed a week and the apartment had everything we needed for a wonderful stay. The balcony is a sun trap where we enjoyed many a glass of wine.
The location is very central and a 10 minute walk to some of the most frequented plazas. There is also a couple of small supermarkets close by and many restaurants - our favourite one being La Fragua de Vulcano, which is just a few steps away.
I wouldn't hesitate to recommend Carlos's apartment for any length of stay in Madrid.