Even though located on Rivadavia -- a busy thoroughfare -- because the apartment is set back from the street by a long hallway and faces to an inner courtyard, it is quiet and the air is quite good.
The room itself is small, with just enough room for a bed and small desk. The kitchen and shower are small but adquate.
Arturo was warm, and ready to help me find places of interest in the area. (We used the translate feature of his iPhone to cover gaps and our respective linguistic abilities.)
It took a little while to get used to the faucets: it takes several turns for them to open. One thing that bothered me initially was that mosquitos were getting in my room through a small gap between the door and the top of the door frame. After finding it, I just stuffed a plastic bag in there when I came in at night, and when going out in the morning. Arturo also provided mosquito incense, but after taking care of the gap, I found I didn't need to use it.
The only other that I disliked was the fragrance in the sheets from the laundry detergent he uses. It was gone by the second day -- a minor annoyance -- but I wish everyone providing rooms would use fragrance-free detergent.