It's a cozy unit in a nice neighborhood. We stayed at Yan's place for a week and Yan was very helpful and friendly.
Although, upstair tenant was very noisy and he was restless. Constantly walking, listening high volume music and TV. The noise was continuing from 8:30 am 'till midnight, he even started drilling something at 8:15 am one morning.
The place is located on one of DC 's nice neighborhoods and 20 minutes of walking distance to Columbia Heights Metro, but there's a bus stop that you can use H2 bus.
This place is better suited for a few days, but a week is too long.