This is a spacious apartment with all the basics you'd need (including reliable internet and AC) and in a great location.
As a solo traveler who entered Barcelona by train at the Sants station, this was an ideal place to stay about a ten minute walk from the station. The nearby metro stations take you just about anywhere you're likely to want to go in very little time -- ~20 minutes or less to La Sagrada Familia or the Gothic Quarter, for instance.
The surrounding neighborhood is lively and there's plenty to do after visiting the usual spots in Barcelona. At the same time, the apartment itself was nice and quiet.
The communication with the host was quick, easy and thorough. Check-in/out was easy. No problems. The place is as advertised.