Maria's apartment was absolutely fantastic. Firstly the location is great, right in the middle of Malasana and only a few minutes walk to Gran Via.
The flat really is beautiful. Its like having you own place, large bedroom with sofa chairs and TV, then a kitchen/dining area, with your own private bathroom.
Finally Maria and her husband were lovely, and made such an effort despite my terrible Spanish. Maria welcomed me with tea and cake on arrival, and brought me some paella and tortilla de Espana during my stay, both which tasted amazing.
I definitely would stay at Maria's again.