We came down to DC for a 5 day trip from Boston and had a great stay at The Monroe. In short, a charming place that's close to the metro and a great deal for the price.
The house is not brand spanking new but thoroughly cleaned and had a lot of personality. There were very thorough directions for checking in, checking out, and where things are located on the property. It was way too hot for us to sit outside but I imagine the yard and porch are enjoyable hangout spots in cooler weather. There was AC in all the rooms and plenty of space to WFH. We left the car in the driveway and had an easy time finding our way around DC via public transportation - The Monroe is indeed a short walk from the red line and the bus stop is right outside.
Hosts responded very quickly to messages. Only downside was some neighborhood restaurants we were looking forward to visit were closed due to the pandemic but it was easy to go elsewhere for food.