Response from Aparts:
Hi Andrea! Thanks for your feedback.
I would like to point out about "people not very friendly". I understand that is your personal perception. So, this the center of the city and there're a lot of different kinds of people.
Barcelona in general is a safe city (instead some typical distractions of the tourist, as in every big city) But, It's important to highlight that, this neighborhood is really safe, because is the hearth of the city and it's perfectly controlled by the local authority.
As you said, you didn't have any problem ;)