Interesting experience but not quite what I expected.
Communication with Ivan was good and the lady (Luz) who checked us in was very accomodating with our arrival time.
The building where the apartment is located is very old and abandoned looking from the outside. The hallway and stairs to the apartment is dark and in a state of disrepair, which to be honest worried me during my stay. Carrying heavy luggage up and down the stairs was a struggle.
The positives about the apartment were its central location (right in the heart of Barcelona amongst the locals), the air conditioning and although we were in a central location it was very quiet at night.
The negatives about the apartment were the poor wi-fi connection (even though there was three different possible networks we ended up creating a hotspot for our children) and to be honest a bit of cleaning was necessary to the apartment.
It's affordably priced, however I felt nervous especially as we were visiting as a family and being told "For security reasons do not answer the door to anyone unless you are expecting visitors" and "...nobody should be allowed in unless they hold a police warrant..." was alarming.
On a whole I personally don't think it's suitable for families.