The apartment seems recently renovated and was clean and well equipped. It's in a perfect location if you're arriving by airplane. The bus stop (for Aerobus) is basically in front of the apartment and the ride to/from El Prat airport is about 15 minutes. A metro stop is also right in front. There's a bunch of convenience stores, bars and restaurants in the neighborhood. Even though there's a lot of traffic outside, it's really quiet when the windows are closed.
Check-in was relatively easy. If the app isn't working, try granting location permission manually in your phone settings, that seems to fix it. Half of us received the codes for the lock on the first day. I sent a message the following morning and the rest of the codes were sent in the afternoon.
On the building's ground floor is a very popular kebab shop. When we arrived on the first day the apartment was filled with smoke from the shop. We stayed for an extended weekend and came to the apartment only to sleep. It airs out really quickly so it wasn't too much of an inconvenience but don't be surprised when you enter the apartment for the first time.