If you want to stay in Barcelona on a budget this is a good choice however we aware that there is a LOT of noise from the street - passing motorbikes and people can all be heard. Additionally you can hear people moving around in the corridors and in neighbouring apartments. I struggled to get to sleep for many hours.
If you are a deep sleeper this will not be a problem for you.
The memory foam matress was too soft in my opinion - I am an average weight 80kg 6 foot tall man and i sunk into it so much that it was impossible to turn around during sleep. This made it very hard to fall asleep.
If you like this kind of mattress (some people do!) then this is a good feature for you as I have not found these mattresses elsewhere.