We stayed at the Mariaje apartment for 5 days recently and it was most satisfying. We used Malaga as a base for touring Andalucia via day trips onthree3 of the five days, and the central location of the apartment helped with the early morning departures and late night returns. We mostly took taxis from Plaza Victoria to the bus and train stations, which is a few minutes by walk although buses also stop there. In addition we would walk to Old Town, whose edge is about 10 minutes away and stroll through there. Several convenience stores are next door. All in all, location couldn't be better.
The apartment is also very well furnished and we did not find anything lacking. Bed, bath, and kitchen linen were all nice and clean. It is spacious, and the fixtures and appliances (including washer) are all modern and in great working condition. We did use the sofa bed, which is more like a futon. Be aware the the back of the sofa does not have feet when flat (at least we couldn't find it), and will tip over unless set up against the wall. Internet was fast, although as another reviewer mentioned, occasionally some devices cannot seem to connect briefly. All in all, very happy with the state of the apartment, and it was a pleasure to come back to each day of our stay.
The owners are very responsive and communication was good before and during stay. We had an issue with a slow shower drain on our first day, and it was fixed immediately.
I would recommend this apartment highly for 2-3 people, and wouldn't hesitate to stay here myself again on my next visit.