The best thing in this apartment it definitely it's location. 1 Minute walk from Catalunya square, near the Rambla, metro station, shops and a supermarket. You can simply walk to many attractions in Barcelona and it's great!
The apartment itself is quiet, spacious and well-equipped (though it could be further improved with more careful maintenance). The communication was mostly good, check-in and check-out were smooth and quick.
Overall, our experience was good and we would highly recommend this apartment.