We loved Jason's spot. He was really understanding when we had to cut a day off our stay, and gave us a full refund for the missed night. There were issues with the boat we intended to rent, but we got upgraded at no cost too.
Best amenities: location was amazing, free easy access on-site parking, on-site capitol bikeshare return, so peaceful, excellent views, great restaurant just steps away
We aren't sports fans, but this would be a great place to stay to see the Nats or DC United. 1 block from stadium.