The pros: Rocky communicated well, responded to emails quickly, was concerned for my comfort and safety. The bed is very comfy and the room is clean and simple. The location is good, close to Union Station, Convention Center, and Congress buildings. The room is air conditioned - essential for DC in the summer!
The cons: The room is on the front of the house, and the street is noisy at night - I experienced sirens, flashing police lights, and motorcycles. I slept with my ipad on a white noise program, next to my ear. The wooden venetian blinds don't block out all the street light, either. To get to the (tiny)bathroom, you need to go past the front door, the bottom of the stairs, and someone else's door, and end up next to the common dining area. That might not bother everyone, but it wasn't enough privacy for me.
It seems to be some kind of boarding house - other people seem to live there or are staying long-term, so be prepared for the bathroom to have other people's stuff in it, and the fridge to be full of other people's food.