Mariona's place is exactly as described and looks exactly as it does in the pictures online. She was there to welcome us when our flight arrived and was very accommodating with an early check-in.
The place was centrally located-- within walking distance to La Sagrada and a short train ride from all other attractions in Barcelona.
It was the perfect place to stay for the two of us. The beds were comfortable and even though the kitchen is on the small side, it was definitely enough for people who want to cook some meals in the apartment.
I highly recommend staying with Mariona and would definitely try to do it again next time I am in Barcelona.