Sam's place worked well for us. Great location - there is some road noise in the bedrooms, but it's generally not a problem. The apartment is moments from the metro, a big supermarket, and Atwater Market. The king beds are great. Sam was very hospitable and communicative. Sam also manages the apartment next door, and the walls are quite thin (so, for the two bedrooms in this unit, one is by itself on a corner, and the other shares a wall with the apartment next door).
Overall, we were really happy with this find. As others have noted, there are stairs from the street up to the apartment. They sounded more daunting than they really were, but if you're stair-adverse, there aren't really other options, so fyi.