Amazing stay, one of those truly remarkable experiences you get in AirBnb from time to time.
Oriol's place is in a perfect spot in Gracia -- close enough to the main part of the neighbourhood that you can walk there in a few minutes, but far enough that it is very quiet and feels very residential. There's a bunch of delicious restaurants nearby, as well as a public market and a bunch of grocery stores and other stores, and great options of public transportation. Also very close to Park Guell, Sagrada Familia and a bunch of great streets.
Oriol himself is a very nice guy, one I already consider a friend. He was a very welcoming figure in my first few weeks in Barcelona, helped me settle, allowed me to practice both Spanish and Catalan with him, and was overall very attentive. The place is quite comfortable -- the room itself is cozy, in the floor there are two amazing terrazas with great views, a very comfortable living room, a big privative washroom that was always very clean, etc. Oriol allowed me a lot of personal space as well.
I recommend this place a lot. You won't regret it!