The apartment is in the heart of Poblenou, about 300 meters from the beach. A delightful area, a bit too touristy along the Rambla, but it's possible to avoid the flow by walking on the neighboring block.
I met Irene, Marta's sister, an exquisite person, smiley and available whenever I was in need. My family and I had a perfect time in her apartment, which is accurately described by the pics in the Airbnb's website. The guest will find all the appliances needed for a short-term stay, and the children's room is just lovely.
I recommend this host and her apartment to everyone visiting Barcelona and wanting to avoid the busiest neighborhoods.