This apartment unit was exceptional. Everything was perfectly clean, the unit was well appointed, the two small balconies were the perfect place to have a glass of wine, and the kitchen was great. It was helpful having a separate area to do laundry as well.
My only issue was that the bedroom closest to the street was very loud at night. I'm a heavy sleeper, so it didn't bother me as much as it did my partner. Luckily it was only the two of us staying at the apartment, so he slept in the other bedroom and I used an app on my phone to drown out the noise from the street.
Don't let the noise deter you from staying here though! Be prepared and download a white noise app beforehand. You should be fine. I don't think there is a better location to stay in all of Barcelona. You're a 2-minute walk to 4 or so great cafes for breakfast, 5 minutes from excellent restaurants, 2 minutes to the metro, and you have easy access to the Gothic Quarter without being right in the middle of it. You won't regret staying here!