I travel to D.C. about once a year and have stayed in a number of hotels there, but this one is my favorite. It is very trendy, clean, and has a friendly, helpful staff. I stayed there recently with a large group and we were well pleased. The sales staff is EXTREMELY efficient and helpful. I would STRONGLY recommend this hotel to any school or group planning a visit to Washington.
FYI: I am very picky about hotel cleanliness and I love how spotless this establishment is. It is VERY CLEAN and although it has been there for a few years it still appears new and updated. The furnishings and appointments are very nice - what I have come to expect from a Hilton-brand hotel.
I have read some reviews about the beds being hard and there is a bit of truth to that. The reality is they are very high quality mattresses that just happen to be of the non-plush variety. I have a terrible back and I sleep like a baby on these. That being said, if you prefer a REALLY soft, bouncy mattress you'd be better off elsewhere, but if you don't mind a firmer mattress, you'll actually appreciate them.
In addition to the fine appointments of the room, my favorite thing about this hotel is the location. The metro stop is DIRECTLY across the street. Just a couple of stops to the mall of the Smithsonian and a couple more to the Capital. Chinatown and the White House are both in walking distance, as are a large number of "fast food" and fine dining restaurants. There is also a pharmacy only a block or so down that offers lots of stuff that forgetful people like me appreciate.
As far as "negatives" I really only have a few. If you stay on some rooms on the lower floors (two through five) there are certain rooms at the center of the building that have diminished cell reception and thus phone service may be a bit spotty in certain parts of the room. I recommend staying higher up in the hotel or at least get a street-facing room on lower floors. Also, recently I needed to briefly meet with my group in the evening (for about 20 minutes) and was told by the evening desk manager that this would not be possible unless I paid what I thought was a ridiculous amount of money. Puuuleeeeease. Speaking of ridiculous...I got the munchies one night and stopped by the Pantry Shop next to the front desk for a regular-sized candy bar. It was $2.00, so be sure to bring your own snacks or you'll go broke.
Anyway, aside from these minor issues I was extremely pleased with my last stay there and would definitely recommend it to others. It is certainly my favorite hotel in the D.C. area!