In general, it was a pleasant experience. Bruno and Linli were very attentive to my requests. I felt welcomed. The apartment is a hidden gem of this ugly neighborhood. I stayed there for 4 weeks.
The bedroom door locks were installed before I arrived. When I bought the wrong coffee capsules, Bruno still reimbursed me the cost and actually brought the matching Nespresso coffee machine the next day.
The neighborhood is indeed full of strangely looking people but I never had issues apart from naughty kids. I'm a solo female traveler. The good thing is that this ghetto neighborhood is only 3-4 streets, while other streets around are fine. I usually walked through Carrer del Beat Joan Grande, it's much nicer than the other side.