The location of this airbnb was amazing. We were very centrally located and able to easily walk to most touristic spots. There was a bit a noise from the streets as they picked up trash but I believe that that would probably occur at any central apartment. The shower head was broken so you had to hold it the whole time you showered which made it difficult to wash your hair thoroughly. Only one roll of toilet paper was provided for two people with a week long stay so we had to go out in the middle of the night when we discovered there was none to be found within the apartment. Towards the end of our stay the water within the shower stopped draining. Also, if you plan on cooking even the smallest meal there are no basic kitchen needs like salt and pepper; however, there are plates and silverware.
Overall you can't beat the location and as we did not stay in the apartment that much we got the best use out of it. If I was to come back to Barcelona I would want to stay in the same area but would probably splurge a little more to get a nicer place.