The place is perfect for 6 people. The space isn't very large, but it's fine for 6 people.
Be conscious that for the 6 people to take a hot bath, efforts need to be done by the 6. However, it's possible.
The place is very well located. The communication with the hosts is awesome.
About the cleanliness of the space, I guess we weren't very lucky, in comparison with previous guests comments, but it was manageable.
Our stay was great, Barcelona is a lovely city.
I would come back and stay in this house again.
Hope you enjoy.