I’m an Airbnb user for almost five years, and I strongly recommend Ariel as one the best hosts I've ever met.
First of all, the flat is super clean.
The position is perfect. Just 2 min walk from Plaza Espanya, so it's also 2 min walk from the metro station and 3 min walk from A1 bus stop(where you can take the express shuttle bus to the airport).
There are at least 5 TripAdvisor-4star restaurants in the same block, of which a Michelin 1 star Japanese restaurant.
The room itself is not just a room with bathroom, but almost an apartment. You'll have a bedroom, a dining room, and a bathroom. If you close the door in the corridor, they're all yours just like a private apartment.
Ariel is super lovely a host. He prepared a lot for my marathon race on the morning of the marathon day and even took a lot of shots and rooted for me while I was on marathon track.
Once again, I strongly recommend anyone who’s going to visit Barcelone to stay at Ariel’s flat.