I had a nice one month stay at Begoña's apartment which is in a great location in central Madrid. The apartment is quiet despite the location in the heart of the trendy Malasaña neighborhood which is full of young people partying especially on weekends. Because it's a small studio apartment, it's ideal for one person. The mattress is a bit soft so keep that in mind if you require a firm one although it didn't bother me. The AC works well which is a must in Madrid during the late spring and summer. The kitchen has the basics for cooking simple meals although there are numerous options for eating out nearby and several grocery stores close-by.
I accidentally broke off the handle of the washing machine during my stay and Begoña's husband fixed it quickly by himself at minimal cost which I very much appreciated.