I took a week-long trip to DC last month and stayed at the Sheraton Pentagon South. It was absolutely one of the most comfortable hotels I have ever stayed at. They provide shuttle service to and from the airport as well as a nearby Metro station, providing easy access to all of the DC Metro area. Their staff is friendly and everyone seemed to be very happy and helpful.
The rooms had some of the most comfortable beds I have ever slept on. I would stay at another Sheraton anywhere just to get those beds again.
PROS: great staff, great rooms!
CONS:
more