I spent 1 full month in Mauricio’s place, alternating home-working on week days and enjoying Madrid during the weekend.
This very cute apt has all the amenities and comfort needed for a monthly stay (including robust Wi-Fi, my girlfriend and myself have been able to work from home together with no issues). The area is super central (you can walk everywhere within the city in 20 min), and on Sunday you can enjoy Rastro market at literally 20 meters distance. Mauricio is very friendly and willing to help and support if any enquiry. I really recommend this place to anyone interested in both short and long stay in Madrid.