Cozy apartment in 5-10 minutes from two metro stations and R2Nord train to the airport.
Absolutely as described, perfect for sleeping overnight for 4 persons (and that's what you'll do if you have rich sightseeing plan in mind), plenty of comfy space for 2. Also there's a small supermarket just at the door (closing at 23), perfect to take some late-evening snacks home with you.
Big thanks to Ferran, will stay with Bed&BCN next time we'll be in Barcelona!