We had an enjoyable stay in this apartment. Its stand-out advantage is that the immediate area is very quiet at night - unusually so in a big city - so a good night's sleep is guaranteed. We also appreciated the good quality couch in the living area and the comfortable twin beds (placed together).
Another appealing feature of the apartment is its balcony which is afforded some privacy by the large leafy tree - a nice spot for relaxing in the mornings.
Among the tourist attractions within a 20 minute walk are the Sagrada Familia, Casa Batlla (a must-see Gaudi designed house) and Park Guell. Local restaurants including Tapas bars are plentiful within a 5 minute walk.
There were a couple of negatives :-
the small kitchen table has gouge-marks which are off-putting - a simple wax tablecloth would solve this issue; also, while the door into the apartment seems secure from the outside, the door lock housing on the inside is sticking out several centimetres at the lower end and the key doesn't engage the locking mechanism which means that you cannot actually lock the door from the inside. In addition there is a noticeable crack in the wood from above the lock to below it. While the neighbourhood seems very safe - and we had no issues - we did find it a bit unnerving at night not being able to securely lock the door. In short there is no excuse for leaving it as it is, the lock needs replacing.