The perfect location.
We flew in to Barcelona and took the aerobus to the plaza and it was a simple short walk to the apartment. There is some street noise, but for the location that is to be expected. I only noticed it when going to bed and waking up. We have a white noise app we use on phone, and the street noise never woke any of us up or kept us from falling asleep.
Bedroom- my son and husband slept in the bedroom, it is two twin beds pushed together, so if planning on having a small child sleep in the middle it may not be very comfy.
Bathroom- Small space but gets the job done. If more than one person needs to shower at a time just be aware to give some time in between or else you will run out of hot water. We were given two big bath towels and two large hand towels for 4 people. The small towels were fine for our children but we ended up having to use one to dry the dishes. The door to the bathroom is just a sliding frosted glass door that doesn't close all the way, so if privacy is something you need, this might not be the bathroom for you. If someone is walking by you can see into the bathroom and hear (and smell).
Kitchen - we only used some bowls and cups, but did not have any sponge or cloth to wash dishes and no paper towels or napkins for use either.
Pull out bed- a little firm but got the job done. Plenty of extra bedding.
The A/C worked great.