I'll start and say that the apartment is lovely, nice, and super quiet inside. I location is fine - It's not in the heart of Ruzafa but it's close enough to everything.
I have to mention some of the downsides of the apartment and my experience. First of all, the host was a bit late, I had to wait 10-15mins at the front door even though we agreed on a specific hour. When I came, the bed was not very stable, one of the legs was tilted and it made the bed not as comfortable as it can be. They eventually came to fix it (after 2 days) but the communication wasn't the best at first, I got an answer that it won't break, which is ok but that was not my issue, it was just uncomfortable. In addition, the toilet is super high - you must get yourself a box or something to make it comfortable.
Also, I felt that even though the apartment is well equipped there were some basic things missing, like a small trash can in the toilet room, a hang for the toilet paper, and there was only a single shelf in the closet.
Other than that everything was great and Julio, Carles, and Inma were always answering very fast and really helped me with all my questions and everything I needed (before and during my stay).