The place is ok. The location is calm and quiet high up in the area so it shouldn’t be too hot. During our stay the temperature in Barcelona was abnormally high, so we experienced the place as very hot. Otherwise it should be fine during a normal summer and lower season.
The apartment is equipped with necessary stuff for a short stay. However all the equipment is a bit basic for a longer stay I would say. No personal touch in the design of the apartment but if you are a pragmatic person and only use it as your base for exploring Barcelona - than it’s alright.