I would definitely recommend staying with Carla and Giuseppe! While we chose to not have much contact with our hosts, our stay was really awesome! Our hosts were very good about communicating with us.
And the space! Such a cool space! Very homey and comfortable...the beds were great! I loved all the personal touches in the space, from the fireplace to family photos to souvenirs from their many trips to all of the books. There was even a ping-pong table, a foosball table, and a drum set.
The home is about a 7 minute walk to the Cleveland Park Metro station, and from there, it's 2 stops to get down to the main part of D.C. I would definitely stay here again!