Cozy space, great trendy neighborhood, terrific host! Dupont Circle is really a nice, safe area that kept us "in the city" without being "IN the city". Cute restaurants, etc. It's a quick train ride to where all the DC action is, the apartment is a 5 min walk from the Metro. I walked to Georgetown for shopping and dinner (may be too far of a walk for some) and many other cute neighborhoods are a train stop or two away.
Apartment was VERY CLEAN! Above and beyond what I have experienced at Airbnb's in the passed. The space is a little smaller than I imagined, but that is my fault for not clearly reading the description. You walk right into the bedroom, there is no other space (other than kitchen/bathroom). My friend and I visited, and one of us slept in the full bed, other on the trundle. No more than 3 people could fit comfortable. It was cold outside, so the small space actually provided warmth and comfort.
Greg was a great host, VERY responsive. A couple of very small issues came up, but were quickly resolved by Greg's involvement. Can't wait to come back!