Overall it was a pleasant stay. The place is small, but cozy and nicely decorated. The kitchen was super well stocked and even had a washing machine. The bed was very comfortable. We also loved the location: Gracia is a wonderful and less touristy neighbourhood with lots of great places to eat, drink and shop around. Metro was close and you can also get to the city center by foot if you fancy a long walk.
However there were a couple of things that left an unpleasant impression. We chose this apartment because of the terrace and even though it's a sunny and a large space with amazing views, the setup wasn't as expected from the photos. Instead of wooden furniture with cushions and lounge chairs we found some sad pieces of furniture, tacky plastic plants, some dying cactuses and a couple of broken outdoor lamps. Anyone could look straight into the terrace because the balcony was missing a coverage, sun protection roof was super old and there is no way we could've made this space romantic in any way. This is very unfortunate since the terrace itself is great.
There were a few old/shabby pieces in the apartment too, like leaky pipe under the sink, wobbly pieces here and there and what looked like a missing smoke alarm from the ceiling. The black iron bench on the photo is the most uncomfortable piece ever and I hope the owners will consider replacing it with a small sofa or armchairs for reading. Otherwise you have to spend lots of the time on the bed.
I also didn't like a very lengthy process of check-in which included sending your own selfie, installing the app, registering there and communicating to the staff with the app (which had more information in addition to AirBnb). The AirBnb ad didn't mention they would charge us 300EUR deposit on the first day.
Overall I'd probably look for something else when I'm back in Barcelona.