I did a two month longer term stay. Ja-Rei and Jose were fantastic hosts with great communication, and the place itself is nicely decorated (photos are accurate). There's great food nearby on H street (probably some of the best in DC), and in Eastern Market. As for transportation, the X2 bus runs on H street (the other buses seemed a little less reliable/frequent). If you're a metro person, Union Station is a 15 minute walk.
The air-conditioning units were great, and the kitchen has everything you would need for simple meals. My only point of consideration for if you are doing a longer-term stay is to remember it's a basement unit, which means you'll get bugs here and there (but nothing substantial -- just a reality of being in a basement). I will say, for a basement unit you do get a lot of light during the day. For a short-term stay, I'd say it's ideal!