This place had a convenient location that worked really well for us, and the hosts were friendly and accommodating. There were a few quirks that I imagine mostly just come along with being an older building. The guest bathroom shower had poor pressure and was difficult to navigate, there was a general unpleasant odor in the bathrooms (though, again, it was clear they had been cleaned). And there a few things that were just in minor disrepair (doors that didn't close correctly, etc.).
Still, for us it made a great home base for our Barcelona experience, and I feel confident the hosts would do their very best to address any serious issues you might encounter.