I stayed at Christopher's house for two weeks. He and Leo, the roommate, have been absolutely lovely. The check-in/out were flexible, i had a beautiful and bright room for me and I could use any house's services and spaces.. they made me feel like home ("mi casa es tu casa" :) ).
I had any comfort in my room, the house was very clean and they were available to listen to any requests.
The position was also very good: close to the beach, to Sant Antoni, to Barrio Gotico and not so far from the centre (Eixample). Anyway, bus and metro station are 5 minutes walking (Parallel). Also many supermarkets are close.
1 minute walking there's a street (Carrer de Blai) full of cheap bars for tapas, sangria and so on!!
To conclude, the guys are very kind and i'm sure you will spend a wonderful stay!
I absolutely recommend Chris's house!