Very well appointed and spacious apartment in a historic building. We were 3 adults, one with a baby, and there was plenty of space and all we needed. There is a large central courtyard with some greenery for all building residents which was nice for our smoker or to give the baby a stroll in pram close-by. There's a small bar by some of the residents that had the Valencia match on and we were welcomed in.
Host was very responsive (within minutes) when there was a minor query on check in.
Location is pretty much ideal, it's a 15-minute walk to the edge of the Old Town and north station, and walkable (~40ms) to
both ends of the huge park that runs right through the middle of the city, with the Zoo on one end and City of Art and Sciences with the aquarium on the other. The beaches are about an hour walk away or 40m with a short metro or bus hop, so if you want to visit the beach multiple times it might not be so good.
Cafe Dulce de Leche was wonderful for a breakfast pastry and coffee. There are some nice bars in the few blocks around the place, and a big Mercadona supermarket. Camaleón bar had some very nice high cuisine tapas and a kind of gastropub vibe