Good, functional apartment. Exactly as advertised, the balcony is nice although quite small. Everything needed for the stay was in the flat, plus a good air conditioning unit. There is a pod coffee machine, so would need to bring own pods or different method for making coffee if you like.
They have a recently installed online lock system for the front door. The hosts were not there on arrival to help us with this, which was a bit inconvenient as we had to figure it out ourselves. Make sure you have charge on your phone for arrival or you will not be able to get in, as the online lock is the only way (ie there is no physical key). It does work well once you get the hang of it.
Overall we had a great time in Barcelona in this cute apartment!