It was a really good stay. You can access it from the Barcelona Sants train station directly by the subway in 15 minutes. The apartment itself located 1 minute walking distance from the subway and 10 minutes from the Sagrada. The district is good, tranquilo, some restaurants and bike rental services are nearby.
Inside the apartment you have everything you need for a short stay, was comfortable for 2 adults and 2 kids. Clean and tidy. Lots if instructions provided how to use the appliances. The only negative side is that there is almost no natural light inside the apartment.
Overall highly recommend for a short stay in the center of Barcelona.