Christina and Clara's apartment, on Avinguda Diagonal, was perfectly located for what we wanted to do, i.e., explore, mostly on foot, Barcelona. It is located very close to La Segrada Familia, and Passeig de Gracia along with many cafes and restaurants. We even walked to the Harbor. Clara was very accessible though we never needed to contact her as she laid everything out so nicely at Check in. I would recommend their apartment without reservation and hope to be able to return to Barcelona and stay there again.