This is a great place to stay. I highly recommend it. It is about 40 feet from a cool downtown area. It is very close to the National Mall, too.
Note: the front room gets a bit warmer than the rest of the unit, so you might want to consider this when setting the heat for the night and perhaps leave that bedroom door open to receive the cooler air.
I had a minor bit of communication trouble. The best phone numbers to reach the hosts on are the ones indicated on welcome page; not the third one that appears alongside the AirBnB message button.
Summary: A great place which I highly recommend and hope to return to, oneday.