Greg's place was in a fabulous location and extremely organized. We loved being able to walk to the White House and all the sights/restaurants from the apartment. If you have a car, be prepared to pay for parking at $15 per night which I missed in the description while booking (also make sure to request at booking or it may not be available).
The upstairs unit was occupied during our stay which provided some additional noise that was not expected so if you are a light sleeper, bring ear plugs.
We had a very comfortable stay in Greg's apartment and he was able to communicate via Airbnb messages very quickly which was nice as well. I would highly recommend this apartment for location, Greg's attention to detail and the brownstone's 1800s charm!