Matias is the perfect host, ensuring that all is in order and responding instantly to any questions that may come up. The apartment is lovely, the location was perfect, and the Mercado de San Antón is very close by, having everything you might need for your stay. There were so many amenities beyond the norm (e.g. washer/dryer) which made for a very comfortable 10-day stay. We highly recommend staying there when visiting Madrid.