This was a great apartment for us, would happily stay again for either remote work or tourism. 2 of us stayed for 1 week and the wifi was great and worked without any issue including zoom calls. On a main road so gets noisy if you have the balcony doors open, but when closed the double glazing does wonders to drown out all noise.
The apartment is exactly as it is in the photos. Very spacious and well furnished. The bed in the main room was huge and very comfortable. Kitchen is quite well equipped, sufficient to cook meals and comes with all appliances and cutlery you'll need (toaster, coffee machine, kettle, microwave etc). The addition of a washing machine and dishwasher was great for us staying there a full week.
Building is well located. Easy to walk to main tourist attractions and close to metro. Very easy to get to from airport via the Aerobus to Place de Catalunya and then a 10 minute walk.
Could do with a bit more lighting in the living room (only the lights above the table can make it a bit dark after sunset or on cloudy days) and a couple of the power outlets didn't work, including the USB one.