This Airbnb is right off Las Ramblas. While the area is very touristy (make sure you keep a VERY close eye on your belongings) you are right by a train station (super clean train system), the Market and the Gothic Quarter. It got noisy late at night because of the bars across the street, but people didn't carry on for too long.
Paola and her team were great and very responsive and we appreciated the hospitality!