I had a lovely stay with the family who had two adorable children and a friendly cat. The location is just minutes to Sagrada Familia and to the train stations. I would recommend staying here but it's really mean for a solo travellers only.
My mobile phone was stolen at Sagrada Familia and the host Josep went an extra mile to bring me to the police station, and helped with translation. Really appreciated his kind gesture. If I'm ever back in Barcelona, I will not hesitate to stay with them.