The best apartment you can find in the area, big enough for a family of 5 and close to transportation and some city attractions like The Magic Fountain or Plaza de España. Also helps that it has two bathrooms and water uses gas rather than a boiler, so you will always have hot water.
The host is also great at communicating and quick to reply, she even gave suggestions of places to eat and directions for public transportation.
Thank you Mariona for a remarkable trip!