We used this appartment with a family of 5 (teenagers of 14, 17 and 19) and really enjoyed this place during our stay of 3 nights. It was spacious enough for 5 and offered all necessary facilities. Beds were very comfortable and kitchen, badroom, livingroom were sufficiently equiped and very clean. The neighborhood was great, a really nice and quiet area with beautiful houses. Also, lovely places to eat and all necessary convenient shops at less than 5m. walking distance.
We visited Washington mainly to see all the POIs and museums at the mall. Three days is not enough by the way, but sufficient to still have a great time.
We briefly talked to Vladi, the partner of Grace, who we did not meet. Vladi is a cool guy that was very friendly and eager to make sure we had a good time. Certainly a place we can recommend to everybody!!