Nina's apartment is spacious, cozy and located in an amazing area of Barcelona! Lots of bars and shops around and Barcelona's main sights are completely near. We felt save and enjoyed this neighbourhood a lot.
Besides that, the apartment feels a bit like no one is really living there (the hosts are a company). Everything is in order, but we missed basic things for the apartment: no soap for the laundry, only few tabs for the dish washer and so on.
Overall I'd definitely recommend staying there!