I truly recommend Carmen's place if you are planing to stay in Barcelona. She is very kind person and helpful (late check in, but she awaited for me and it wasn't problem for her). Place is very clean and comfy, however i only slept there due to great location so i was out most of the time. Very well communicated with BCN El Prat and other parts of the City (Metro Station and buses). A lot of cafeterias to have a breakfast or Markets to get all you need.
Don't waste the time for looking a proper place, here is all you need.
Gracias Carmen!