I can't recommend Synta's place enough for anyone heading to DC, whether they're brand new to the area or longtime DC travelers. The accommodations are every bit as lovely as they look in the pictures. The bedrooms are private and very comfortable-- during my stay, my mattress was actually replaced with a new one, and both of them are nicer than anything I've ever slept on.
Synta is also an excellent host that goes above and beyond. She has a recommendation for anything in DC, from restaurants to cool stuff to do to what scenic bike ride she had done recently that you should try. If you're a DC regular, come for the great room in a lovely house and convenient location. If you're a DC newbie like I was, come for the local perspective and advice on everything DC, or even a bike ride, if you're into that sort of thing. You definitely can't go wrong.