This accommodation is definitely well worth it.
Whilst it's not in city center, I found it better than if it was.
First, it's only 1 min walk from the Metro station (that offers tickets of unlimited rides of up to 48 or 72hrs to cover the entire city trains & buses), which helped me covered all the landmarks.
Secondly, the area is safe and convenient, only 2mins walk from supermarket and bakery to cover necessities. I was there on Friday night and slept well through the night (and every night indeed) without any noise nor loud music.
In fact, I'm a solo female traveler and decided to walk to & from city center for 2 consecutive nights. Not only it was safe overall, but it was also a better way to explore streets of Barcelona neighborhoods where you'll come across abundance of eateries and markets.
Lastly, Angeles put in all efforts to assist me with smooth check-in and helped me reserve my suitcase at check-out. She also helped with suggestions and left a book of tips from other guests, which was handy.
Can't beat this level of utmost care and value for money,
muchas gracias Angeles.