My wife and I were guests at Romina's apartment. The apartment is very clean, with bright room and small bathroom in the room. We shared kitchen and living room with other two guests. The kitchen is very well equiped and it's possible to prepare food there easly.
The big supermarket is near apartment and also metro/bus station to the beach. The location of the apartment is near Mestalla stadium, so be aware if Airbnb shows differently. You will need 20minutes to the city center by foot.
Romina is very friendly and nice host, ready to help although is in phase of learning English, but it was not a problem at all for us. :) We enjoyed her company, and found it interesting to learn a Spanish a little bit. :)