The apartment is in a great location without noise. It is close to the center and everything else to see in Barcelona. Most things can be bypassed on foot.
It's not very clean. the kitchen is well equipped but you have to buy everything if you want to prepare food and even basic things like salt, oil, sugar which is pointless if you come for a few days. All the doors in the apartment creak terribly and need to be lubricated.
The beds are not the most comfortable in the world but for a few days of sleep they are ok.
There were not enough towels and those who were could be a little better.
In up to 3 days the apartment is ok. For more than 3 days I would not recommend this accommodation.