Patricia is the perfect host, very responsive to any questions and provides excellent recommendations and advice on Barcelona's sights and restaurants. The Poble Sec location is excellent, with easy access to Metro, Museums (Joan Miro and Catalunya) and the beach. Nearby Carrer de Blai is a several block long street with many good restaurants to choose from. Local brewery Abirradero is one of the best in Barcelona.
The apartment is very clean, nicely appointed and great for a couple, for a couple with child, or like us, two friends (two separate bedrooms). We enjoyed the balcony in the late afternoons to sit in the sun. If you enjoy cooking, there are ample utensils, pots, etc., for you to cook anything you wish. The apartment itself is quiet, so the sleep quality is also very good.
There are several places to rent a bicycle nearby. Barcelona is great for cycling with separated bike lanes and even a "bicycle freeway" (being extended now to the west along Ave. Diagonal). Sagrada Familia is about a 15 minute bike ride, 20 minute Metro or 3 mile/5 km walk.