I rented this place with my parents since it was close to the Hospital where I needed to have surgery and wanted to have my recovery in the nearby.
Even the flat is announced for hosting up to 4 people this is not possible in practice since basically you won't fit in the living room/kitchen. For 2 is ok but not for more. When I arrived I discovered one of the mattress was broken.
There is only hot water for one person, second will surely have to use cold water since the container is really small. This is fine for summer though.
The place is located in a place where there is a lot of noise at any time and there are some strange people at night so be prepared to stay alert.
We had 5 days of cold inside the flat since the heater wasn't working as expected and wasn't heating the place until they gave us a portable heater.
The stoves weren't working properly so cooking something was taking ages. Even the landlord went there in person we didn't get a solution.
Noises from the people living upstairs are hear the whole day as well as late in the night so be prepared to go to bed late and don't expect this be a place to relax.
If you are a young person coming here to have party in Barcelona and eat outside everyday this place is ideal for you. Otherwise search for another place. You have been warned!