The apartment itself is very nice and in a comfortable and secure building. The location is good if you want to go to more touristic locations and is directly next to a well provisioned boulevard / path that can take you across Barcelona from North East to South East. We walked this every day from the apartment to the other side of town.
The apartment itself is also very clean, comfortable and accomodating. It was really useful to have a coffee machine (pick up some pods basically anywhere) as well as somewhere to cook basic meals. I highly recommend picking up some local cheese / meats / bread. There is also a washing machine which given the number of hot days was useful in keeping our clothes clean.
The only thing to be aware of is that noise transfers between apartments so bring earplugs!