The apartment is very well decorated and bigger than what we expected. We were a bit unlucky to be there during a renovation period for the building so we woke up as soon as the workers started in the hall. The temperature for the shower is a bit tricky but apparently it's going to be fixed soon. Also a bit noisy because of the upstairs neighbors.
We had a really good communication with Marcello.
Be prepared to pay a small extra cost for the city taxes, as this is leased by a company it's working like an hotel, I guess...
Anyway, I recommend it as it is in a nice neighborhood, walking distance from Sagrada, Park Guell and metro station to go in city center. Also a bus station nearby to go back at night when the metro is over.