Love Oscar's place, is super big, clean and perfect for families. We were 7 people and 2 dogs and the house was more than enough. Also is in a walking distance of all the major beaches in Valencia, a Mercadona and cool restaurants.
Oscar and Mª del Mar were SUPER helpful in all our trip.
Finding a parking spot in near streets can be tough, so keep that in mind. The neighborhood Cabanyal is really authentic and I loved it, but if you like new buildings and modern vibes probably is not your style.
I recommend it for large groups.