Overall, a very nice experience and I will stay there again for my next visit to Washington DC.

Liked: The room was very nice and the bed was SO very comfortable. The staff was very friendly and the concierge suggested an excellent place for dinner and brunch.

Superb

Great stay

Liked: Location was excellent, walkable to a lot of places and right next to the metro where pretty much every subway line comes through. Bed was very comfortable, good water pressure. All staff we interacted with were incredibly nice and helpful. We really enjoyed our stay and will stay here again.
Disliked: Only negative was the ~$60 valet parking but that seems to be about the best you can get in the city. The valet guys were very nice and courteous though and actually only charged us for one night in the lot since we got in super late on Friday night which was very nice of them.

Came to tour DC, unfortunately...

Disliked: The parking was expensive, chose to park elsewhere.

Exceptional

Liked: Everything was perfect. Very happy with the Marriott Metro Center.
Disliked: Nothing disappointed us.

Exceptional

Liked: The location was great for us to walk to all sites we wanted to see. The staff couldn?t be more accommodating!

Superb

Excellent

Liked: Clean, comfortable, extremely convenient, very courteous staff. Only minor issue is lights on some elevator buttons and up and down light bulbs are out.

This hotel may be one...

Liked: The location is excellent because it is really in the center of the city. The room is cosy and spacious enough for a single traveller. The linnen was comfortable.
Disliked: I did not see any bad aspect. Just the hotel building seems to be a bit too old-fashoned.

Exceptional