Positive: really amazing friendly staff, starting from the receptionists and ending with the cleaning lady and the repairman.
There was a problem with our check-in, since something in the apartment was broken. We checked in 2 hours later than agreed, so we were offered to check out 2 hours later as well. So communication worked well, and the problem was fixed, even though it was not very convenient for us anyway.
Location is ok, it's in-between the city centre, Sagrada familia and the beach, so it's 15-30 min walk to most of the things you'll probably want to see.
Negative: there is a construction going on next door, so be prepared to wake up before 8-9 am and leave the apartment until the evening, when the work stops. The construction is right behind the wall that goes through the whole apartment, and they are banging and drilling that wall quite a lot. So unless your schedule fits the schedule of workers - better chose another place for the next few months. We contacted the host about this, to which they said that neighbors are not obliged to inform them of any works being done as long as they start after 8 am. And even though I told them about it, I doubt they will be warning next visitors. So be aware of this.
Also the rooftop is closed due to covid, it was written somewhere on the form that we had to sign, but I don't remember it written in the description.
As for the other small things: the floors are bloated, so the doors are not opening and closing property, you'll have to walk through them sideways to fit in that small gap that opens. The bathroom door is also not closing properly, leaving the gap, so be sure you're reeeeally close with the people who are staying with you...
We were provided one little hotel-sized soap, 2 mini-tubes of shampoo/bodywash, 1.5 rolls of toilet paper and one garbage bag per 3 people for 6 nights. Supposedly you can ask some of that at the reception, but there is nobody working there because of the covid. That's not a big problem, but shows the attitude towards the guests. The iron is provided, but not in a working condition, unless you want to burn your clothes and the whole house with it.
Summary: super-nice friendly staff, who earned a star from us. But you are not going to Barcelona to make friends with the cleaning lady, so I suggest to stay literally anywhere else but here...