My husband and I stayed at Maria's place during the final days of Las Fallas, which was by far the highlight of our Spain trip. Maria herself was there to greet us on arrival, which was very kind. She is very patient to explain the ins and outs of the apartment, including how to use the washing machine and even the bluetooth speaker in the bedroom. In all, we really had a great feel for the apartment and neighborhood, thanks to her.
Maria's place was about 10-15mins walk from all the downtown action and only 5mins walk from the Joaquin Sorolla station, so super-convenient from a location point-of-view - if you don't mind walking.
What else did I like? The apartment itself is very modern, spacious and clean and if you wish, you can open up the windows for fresh air and lots of natural light. The bathroom is also stocked with lots of useful products. We felt very much at home.
Two things to note: The apartment is up 8 or so flights of stairs, so if you have heavy bags, or are injured/unfit, you need to take this into consideration. Also, as is common in older buildings, the hot water can be a bit slow to arrive - and quick to disappear.
Overall, we had a fantastic stay at Maria's - and really appreciated having a quiet apartment to retreat to during the Fallas craziness. Gracias, Maria - eres un ángel!