The apartment is quite well located in Barcelona. We found it easy to walk to most of what we wanted to see and do in Barcelona, or in other cases it was a short walk to the metro and an easy ride to where we wanted to be. The area itself has a variety of restaurants, bars and tapas places which made it convenient for meals when we were back at the apartment.
The apartment was also comfortable and well decorated. We are a family of 4 and were happy there. A particularly nice touch was that the windows onto the street are double windows which eliminated all of the street noise.
We did notice that the neighbors were sometimes a bit loud at night. They were just keeping Spanish hours, I suppose, but it was a little difficult a couple of the nights we were there. Also, two of the appliances were not working while we were there (the dishwasher and the washing machine/dryer for clothes). The first wasn’t a problem for us as we ate all of our meals out, but the other was a bit of a challenge as we were in Barcelona in the middle of a 2 week trip through Spain and had planned to do laundry while there. I assume these will be repaired, but in the event that you will rely on some of the appliances it may be worth reconfirming.