The apartment, for the price, is okay. The shutters do a good job blocking out the light and it has a good enough location to allow you to access various parts of Barcelona. If you want something basic which would do the job to sleep in and not do much more than the apartment is fine, for the most part.
However there are a few problems. The noise the apartment faces onto is extremely loud in the morning so if you are a light sleeper and intend to wake up later in the morning I wouldn't recommend this apartment.
The facilities are also quite poor. The dish washer door wouldn't close and the tumble dryer doesn't actually dry clothes. Normally that wouldn't be a massive problem in a hot country but the clothes rack doesn't fit on the balcony outside so you will have to dry your clothes inside which takes up a lot of space.
I would also strongly recommend not having someone use both single beds in the second bedroom. The room is too small to comfortably fit both so you would have to clamber over one of the beds to get out of the room. The clothes rack would also hang over the head of the second bed.
The second bedroom also has no door, so again there are noise issues so this is not a good apartment for light sleepers.