The apartment is way too small for 5 people. In the smaller room there are two single beds (one below the other) but you cannot really use both of them because the room is too small. This we thought, is a bit of a scam. Also the bathroom is way to small for 5 people.
Attention: Do NOT leave any of your things on the roof terrace!! It is not safe! We had our laundry stolen overnight. The hosts were not helpful with this issue.
Also there is no sun umbrella for the roof terrace which makes it way too hot during the day. We asked for an umbrella but the host just did not respond anymore so we bought our own umbrella.
Overall the apartment is okay for 3 people. The location is very central near Ramblas but the area is not very nice. For our next stay in Barcelona we will stay in a different apartment.