I spent one week in Oswald's apartment and all was perfect. The position is strategic for visit Barcellona and also to reach and arrive fromthe airport (the line A1, A2 of the Airbus arrive near the apartment). The apartment is near Placa Catalunya and Universitat, so near to METRO, bus and the beginning of The Rambla and the passeig de gracia.
I stay there with my family (we are in six) and the apartment was perfect for us: clean, coherent with the description, Oswald available, before, during and after. I strongly reccomended.