If not for one particularly negative experience, I would recommend Mario. The place is cheap, but relatively central. The room is small, but at least has a desk. The place was quite clean, save for the kitchen. We had some issues with communication, but that was at least partly my fault, and very much AirBNB's. Most of the time, Mario is quite a nice person.
Now to the negative. For complicated reasoi, I wanted to extend my stay at Mario's place. I filed a request a few days into my stay. He kept me on the hook for two weeks, waiting for someone else to book the room, and even when it got booked, he only told me when I explicitly asked him for it. Arguably, I should have been more forceful. But what got me especially angry is his reasoning. He said that he would rather host a woman. I don't know if this was just his way of avoiding an answer or what, but it still upsets me.