I'll start off by saying that Bred and Nadja are fantastic! My girlfriend and I were staying 2 nights and were greeted by Bred's mother when we arrived. Although she didn't speak much English, she called Bred and to let him know we were home and I spoke to him to get the essentials (wifi password). We met the couple later on in the day and they were very polite and let us be.
The place is VERY tidy and clean with a lot of character. Most importantly, the bathroom (although not connected) was very clean with proper amenities that Bred kept stocked. The room is not that small, much to our delight.
For our 2 nights, my girlfriend and I were very sick so we spent a lot of the time inside the bedroom (unfortunately didn't get to do as much sightseeing and dining as hoped) but we weren't bothered and felt comfortable the whole time.
The location is incredible as San Lorenzo is right outside, however, this can become very annoying, too. It is very loud as the shopkeepers roll their heavy merchandise over cobblestone steps both early in the morning and in the evening. This obviously cannot be blamed on anyone but light sleepers like us should take note. I had trouble sleeping the first night because of the noise - we kept the window open a tiny bit because it was also hot (the entire region was blazing hot). The 2nd night, I slept perfect: we closed the window, closed the blinds, had the fan on to create white noise and I had ear plugs just in case :)