Vanessa (managing on behalf of Frederick) was a great host and communicated very well.
This was a good apartment from which to explore Barcelona. The Sagrada Familia and Parc Guell was just an easy walk away and the metro station less than a 5min walk and on a line that stops at both Placa de Catalunya (just 3 stops away) and at the beach.
The apartment was spacious enough for us, but we were just two people (covid disrupted our travel party). The beds were comfortable and the apartment was very quiet, with outside roller shutters to make the rooms dark at night, so we slept very well.
There was a large supermarket just one block away. The kitchen had everything we needed to cook at home and had a large fridge. The apartment had central aircon and it worked well, which was important since there was a heatwave while we visited.
The living area was not the most private, given other apartments just across the street, but that is not unusual for Barcelona with high density apartment blocks and it did not bother us, but is worth noting if you are sensitive about privacy.
We did not use the rooftop area due to the heat, but it is a nice and private area and the apartment has a dedicated section of the area. Under different circumstances we would have used it a lot.
The wifi was not super fast, but served us well. But we were out most of the time and did not use it extensively, so can not really comment on it.