Although we didn't personally meet Greg (because we were out most of the time) Greg made us feel incredibly comfortable at his lovely apartment. If we had a question, he answered it within minutes. When we arrived, there was a huge pitcher of filtered water in the fridge. The apartment was impeccable!
Dupont Circle is a wonderful neighborhood. The metro is in easy walking distance. There are plenty of restaurants nearby.
Take the time to admire the architecture of the neighborhood.
I would love to return to DC soon and stay at Greg's again!!
PS. Greg has great charging stations for your electronics!!