Nice little apartment in a building full of character. Some reviews mentioned the street noise - but we only heard that during the day time with the windows and shutters open - once they were closed we could hardly hear anything.
Alfons X Metro stop wasn't too far and we could get to Jaume 1 metro in about 25 minutes. The way back was a bit slower as we had to walk back up the hill, which wasn't too bad but was getting a bit tiring after 3 days.
We could walk to Parc Guell and Sagrada Familia in about 15-20 minutes - easy downhill walks. Búnquers del Carmel was nearby and that is well worth a visit especially at night.
There were a couple of handy small supermarkets and a pharmacy within yards of the property.
All in all an enjoyable stay in a nice residential part of Barcelona with quick links to the rest of the city.