Unfortunately, I never got the chance to meet Pierre face to face, but the communication with him was very smooth, responsive and cordial. I stayed in BCN for NYE and my original airbnb was a scam, so i had to find an alternative quickly. Pierre responded within the hour even though he was on vacation, he quickly set up a meeting between his father and myself so i could get to the apartment.
The place is great, it is in a cute little alley few metres away from las ramblas. The bathroom is shared with the other inhabitants, but it is very clean and else the place offered lots of privacy as the living quarters are in opposite ends of the apartment. The bed apparently is not the most durable and broke during my visit, but quality like this is to be expected in airbnb quarters in my experience, so I guess that happens... It did not affect the quality of my stay and the host's family, which was extremely nice to me and my friends even though we did not speak a lick of Spanish, took it with humor.
I can highly recommend Pierre's place for anyone looking for accommodation near Las Ramblas.