The apartment is in a great location. Only 5 stops on the metro from the Barrio Gotic and about 5 mins walk to the beach! Poblenou itself is a very pleasant neighbourhood. We particularly enjoyed eating at Mes de vi, which is just around the corner. The restaurants on La Rambla are not so good and quite touristy. I also appreciated being a 20-minute walk from the CCIB (convention centre), where I was attending a conference.
The apartment is a really nice space. I loved the big dining table and the sofa was really comfortable. The kitchen was functional, with plenty of crockery and utensils. The only hitch was the oven, which was not working during our stay. I really appreciated having a washing machine, dishwasher and tumble drier in the apartment. All in all I think this is a brilliant option in Barcelona that allows you to combine city sites with the beach, while staying in a quiet and secure neighbourhood. Highly recommended!