We stayed there for 9 nights. We accessed the apartment without needing the host to be there, so it was completely self check-in.
It is brand new apartment, very well equipped and cozy. The location is great: Casco Viejo (the historical centre of the city) is near, and Guggenheim Museum has good walking distance from there. Whereas it is new apartment few issues occurred there (few days run only cold water). Our contact was Aitor, who tried to fix it with service technician.