This apartment is on a lively (it hosts a few popular tapas restaurants) little square just inside the edge of the El Born neighborhood. Downloading the app to open the door while also accessing the instructions on my phone was a bit of a drag, especially as my phone was naturally dying after our flight, but still the app was easy enough to use.
There are perhaps a dozen restaurants and small markets within a couple minutes walk of the place. El Born is a charming warren of narrow lanes and plazas and sights, such as the Picasso Museum. At the same time it seemed to be less hectic than El Gotic, which is an easy walk away. The beaches are a long walk away, but still doable. Make sure to bring beach towels or buy them on the walk over, as there are none in the apartment, that I was aware of.
Once inside the apartment we felt secure and safe. I've read that the neighborhood has been considered sketchy, but we didn't see any indication of that being the case. Closing the doors and shutters at night completely shut out the chatter from the square below.
The apartment was set up with two bedrooms, one with a queen bed and the other with twins. There's also a pull-out bed in the couch, comfortable enough as they are. There's a full bathroom and a half. Plenty of room for our 3 adults and 2 kids.
Don't rely on finding a fully stocked kitchen here, or even coffee, but that's just incentive to wander out in search of necessities.
Great place all said.