Marta & Paul are great hosts. They responded all my questions with quick and detailed answers.
Also worth mentioning Josep who is their contact in the apartment. He was super nice and patient. I was late 45 minutes to meet him and he still greeted me with a smile and showed me around the apartment.
The apartment is in a great location right next to catalunya square. It was very clean and roomy. I stayed there with my wife and baby and there was plenty of space for the baby to crawl around even with the luggage and the stroller in the living room. The apartment contained everything we needed and more. The existance of an elevator was really helpful.
In conclusion, great value for your money if you want to be in the touristic center