We spent a month in this apartment, the idea was having an airbnb while looking for a long term apartment in Barcelona.
First - the apartment is not the one showing on the pictures.
These apartments are managed by a company meaning that they are meant to be rented but nobody is living inside. The decoration are very basic, kitchen equipment is not in good condition, nothing to clean the apartment, etc. The value for money was really disappointing : our fridge didn't work for a week (we had to wait 5 days for someone to fixed it), we had 0 way to clean the apartment (there is only a broom and it's seems very complicated to get the vacuum cleaner - still waiting for a feedback on this...) which is the minimum after living for a month in the same place. Also, there is no luminosity on the apartment (1 floor in an interior courtyard).
The only good thing is the location. Close to La Sagrada Familia, subway station in front of the metro and very nice neighboorhood. Check-in and check-out was easy (everything automatic).
I do not recommend this place for long term rental.