We loved our stay and our host Andrea. The room was spacious, very comfortable, and spotless clean. Shared bathroom was not a problem. Our neighbors were considerate and we didn't wait for each other more than a couple of minutes. There are many little details we appreciated like cotton swabs, coffee, tea, water and even candy (really good BTW!).
As other travelers said, it's challenging to find. I recommend asking people for directions to Campo Santa Margarita. Once you arrive to the square, there is a pizza place and it's right next to it. But since the aisle is gated, you wouldn't think that you can get inside... So it's tricky. It would be great if Andrea included a detailed description and directions along in the confirmation email.
Other than that, we truly loved it and would return.
One more thing: when you have breakfast, they'll serve you pastry and coffee first, and then ask if you want eggs... a bit backwards for us. So if you like protein, inquire about it, so that you don't have to have croissant and jam, and then eggs after.