The location of the apartment is totally convenient, since it's less than a minute from not far away metro station. The building is clean, with a good working elevator. The apartment is provided with the properly working heating system, which is an important issue for the winter time in Barcelona.
Carmen is polite, guests oriented host, to contact with whom is simple and pleasant.
I recommend the Carmen's apartment as a place, where you may have a real relaxation after a busy day of researching Barcelona.