We had wonderful 2 weeks in Domingo's apartment in July 2019 and would strongly recommend it for families. The apartment is well equipped, very spacious and spotless. We used the kitchen a lot and had breakfast and lunch most days on the balcony overlooking the sea. As mentioned by someone else, the photos really do not do the view from the balcony justice.
We have 3 young boys who loved the residential facilities - the swimming pool, football pitch and playground. There are two pools, one for very small children and the bigger pool which has shallow to deep gradient, meaning we felt safe for the kids to swim in the shallow end. The beach is really nice and a very short walk and was a big hit with the kids. There is beach equipment in the apartment to borrow. The apartment is air conditioned and has modern equipment.
There are a lot of restaurants nearby, including some lovely ones on the beach near Cubelles. We had a car, but we also used the train station in Cunit to get about. We visited Cubelles, Sitges, Barcelona, and Portaventura.
Domingo was a great host; Any request was always responded to very cheerfully and helpfully.
Overall I would strongly recommend this place for a family holiday.