Mark’s is a great host and the place was great! It is an easy walk from Union Station. H St is also very accessible by walking. I had no issues exploring the area on foot or any issues with the apartment.
The only con is the spiral staircase. It is tricky if you’re afraid of heights or have a lot of luggage but, I loved the design/layout to the roof (& only had one bag). It’s just something to consider but it did not deter me from wanting to stay there again!