Sean's place is very, very good, an all-you-need apartment, clean, spacy living room, good kitchen, very good bathroom and comfy sleeping room. It is a cute basement apartment, with nice decorations and good supplies. You have access even to a small balcony on the back.
The location is the only but for me. It is right beside the metro green line (Georgia Avenue), so you can certainly count on that. However, if you are not planning to just leave the house in the morning and arrive at the end of your day, but being a bit more flexible, the house may be a bit too far from the center. Walking to downtown will take you an hour, at least, and the metro is around 20-25 min to Archive, for example. It is also a housing region, so don't count on many nearby options of bars and restaurants - at least not a variance around the apartment. But there are some, as well as a CVS and a supermarket.
Sean's assistance was great, he quickly answered any of my texts and was very accessible and helpful. If you are planning (like me) to stay for a longer time in DC, I strongly recommend - his place is a great option for the value.