Good studio apartment and excellent hosts - María and her husband were very helpful and approachable.
The apartment is small so perhaps not great for two people, but for one person it is plenty big enough and has everything you need for cooking, cleaning etc.
The apartment was clean when I arrived, and had basic things available like tea and coffee.
The location is very good as there is excellent public transport in the area, and plenty of supermarkets and shops nearby, and the proximity to the large Retiro Park is also a good feature.
The apartment is in the basement which is good as the temperature doesn't get just as hot.
Whenever there were any small issues it was easy to contact María, and any issues or queries were resolved very quickly.
I stayed in the apartment for just over two weeks following surgery - would recommend to solo travellers.