Kilian is a great and very hospitable host. He was very flexible. Allowed us to check in at 11:30 pm and to check out very late on the last day at 6:00 pm.
He gave us great recommendations and told us where to go in Barcelona.
He even changed the mattress for us (we wanted one big mattress rather than two small ones) and he came and changed it with new sheets and all.
We just felt taken care of.. and he was very responsive. Always replied to our texts and was extremely kind.

The apartment itself was cozy. Well situated near the "Fontana" metro stop (5 min walk)... and that means you can get to anywhere in the center (las ramblas, El Pasege de Gracia, the beach) in 10 minutes (Metro is very convenient way to move around) Sagrada Famila and Parque Guell are within 10 minutes walking distance.

The neighborhood itself is safe and it has a lot of cute shops and restaurants.
The kitchen was good. There's a fridge and oven and all.
Bed was very comfortable. Bathroom small but shower works very well.

Also, we rented only for 2 but the apartment is enough for at least 5 people!.
We will be stay there for sure next time we are in Barcelona.