Renán's apartment is a really nice studio, clean and modern with everything you need for a short stay. There is no washer though, something to consider if you're planning to stay for more than a few days. It's on the last floor of the building, and you have a private terrace available which, if the weather allows, makes for a nice outdoor dining place or just getting some sun.
There is one main thing worth considering if you end up staying at the property during Fallas. Fallas is certainly loud throughout the whole city of Valencia, but there is a Falla just around the corner which is guaranteed to prevent you from sleeping until 4AM during the days of Fallas. So either you're ready to join the party, or you'll have to find something to do until 4 in the morning during the days of Fallas.