Our flight arrived late to Barcelona, and they were very kind to wait for us late in the night to open the door and explain how everything worked.
The location of the house is great, only a few blocks away from Sagrada Familia, but in a quiet neighbourhood. Subway is right across the street, as well as supermarkets, coffee shops, and bakery shops. The house is cosy and modern, it has all the amenities available and in perfect conditions. It is however very hot (at least when we were there - August) making it difficult for us to sleep at night. The cooling system is very loud and not sufficient, making it impossible to have it on during the night.
Further, on the description of the house it says the tourist tax is 3e per person per night, but when we got there they told us it was 4e, unlike what was written and making the argument the site hasn't been updated since April. Considering that that was not our fault, we were a bit upset with the situation.
Overall, it was a nice stay and we enjoyed Barcelona very much.