Fantastic! I'm so happy I chose Oriol's place, it was exactly what I was looking for, and it exceeded my expectations.
Location: was very convenient for me, and there are some fantastic restaurants in the neighborhood, also vegetarian and vegan friendly. It's 10 minutes walk to Park Goel, 15 minutes walk to Sagrada Familia, and by metro, you can reach the Gothic Quarter within 30 minutes. You can see on the map where it is. I loved the small neighborhood market, where I bought food and had breakfasts. Also, very convenient to reach the house from the airport. On the way back to the airport, I took a taxi because of the time (4am) and paid 35 euro with mytaxi app.
Room/apartment: you have a lot of privacy. Your own small room, with a table (which I needed for work), great internet connectivity, a heater for winter, AC for summer, your own big balcony and a laundry machine. The bad (for 1 person) was very very comfortable with the best pillow ever! This is a duplex, which means Oriol's lives on the first floor, and you on the second. The kitchen is well equipped and I kept some vegetables and fruits in the fridge.
Communication: Oriol leaves early in the morning and comes back late at night, so his mom (Montse) who lives in an apartment across the hall welcomed me. Both are lovely, friendly, caring, and though don't speak much English, with the use of G.translate communication went smooth, and fast (and sometimes the sister is replying the messages here, as her English is very good, she lives in the US). Warm welcome, perfect hosting.
I'm VERY GLAD I chose to stay here!