A great a apartment in a very quiet area, yet close to the centre. Walking to the beach and the northern end of Parc de la Ciutadella is about 10 minutes each. The apartment is well connected to public transport, 45-60 min by metro and bus to the airport, 20-25 minutes walking to the Gothic quarter. It was very clean and the hosts communication was great and timely. We would definitely stay again!
The only thing that light sleepers should be aware of is that the AC in front of the bedroom makes a scratching noise regularly, and switching off the AC does not stop this. I slept with earplugs, which worked well and it didn't disturb me anymore.