A decent place overall. It was very close to Sagrada Familia and the Metro stop. However, don't expect much of a view from the apartment as it is only visible from a small bathroom window, located above the toilet. The bedrooms were tiny. It was only my wife and I, but good thing there was a second room as otherwise, there would have been no room for our luggage. As for the second room, it was so small, you literally had to squeeze in between the foot of the bed and the wall, in order to get by and the mattress was jammed up against the heater, which is an obvious fire hazard.
The shower was also tiny and had very little water pressure, in addition to a door that didn't fit. There was a sizable gap that allowed the floor to get pretty wet unless you were very careful about directing the spray away from it. It was a total Mickey Mouse job.
The place was clean though.
As for communication with the host, don't expect much. Prior to our arrival, we had seen the news about violent protests in Barcelona and had concerns our stay would be affected. Numerous messages to the host went completely unanswered until we got Airbnb involved. We then heard from the host (or his cousin Paul) immediately after. Following that, communications pretty much ceased again. When we arrived, he didn't answer any messages and we had to buzz him via the intercom to let him know we arrived. Check-in process was easy enough, although there was a local tax 2.25€ per person, per night, payable in cash, which was NOT included in the listing details (https://www.airbnb.com/help/article/251/what-if-a-host-asks-for-more-money).
If you have a car, street parking is virtually non-existent. They do have an arrangement with a garage just down the street though, which will save you 10€ per night vs other local options. Again, this was payable in cash to the host. They were kind enough to provide us with the key and option to use it, with payment to be made later. However, again there was no follow up nor response to communication and I had to track him down to settle up when we were leaving.