Beautiful Hotel, Great Price
I stayed at the madison hotel for 3 days in august 2012. The hotel was really beautiful with a lovely decor. The lobby is spacious with an adorable cafe/sitting area. The rooms were stylish and clean and the bathrooms were really nice and clean as well. The staff was really helpful, they gave us an upgrade and were there whenever they were needed. They have an excellent valet parking service (40 a night) and a chauffeur, who when available will drive you to your destination, though he wasn't there the first 2 days of our stay. The location of the hotel is perfect for sightseeing. It is a five minute walk to the metro station and a 10-15 minute metro ride to the smithsonian/mall where most of the museums are located and only a ten minute walk from the white house. 
The only downside to the hotel would be the room size. We stayed in a luxury room with 2 queen beds and the room was definitely on the smaller side with not much room to maneuver and though we were supposed to have a better view than the deluxe room all we saw was an office building. If you care about extra space and a nice view I would make sure to book a terrace room or suite.
 Overall the Hotel lobby, staff and location were all amazing and i would definitely stay there the next time I go to D.C.!