Great and attentive service, great location, room is rather small
We were in Washington DC during the memorial day weekend and chose to stay in JW Marriott because of its great location, very close to the White House and other monuments around.
We got the room as we requested, high floor and extra pillows and found the standard,kingsize bed room acceptable. The bathroom though was at the small side.
Service at the restaurant during breakfast was good. We were seated right away on both mornings, the food was delicious and the selection was generous.
Celebrating my mother's 60th birthday, we contacted the hotel in advance to arrange room-service for breakfast and a bottle of champagne to be delivered to her room on her birthday.
We were thrilled by how responsive the hotel management to our request and how professional they were. The director of restaurant department took the extra mile by personally making sure that everything was catered to our satisfaction and followed up with separate email later on during the day to inform us that our request had been carried out and that they provided a complimentary fruit platter to the breakfast package. How thoughtful! 
Having worked in service industry myself, this was exactly what I would define as great professional and customer-focus service.
Thank you JW for contributing in making my mom's 60th birthday a great success!
We'll be back.