A Horrible Stay
Let me preface this by saying that I am generally willing to give the may hotels that I have stayed in the benefit of the doubt. Running a hotel is difficult, so I am appreciative when they not only meet, but surpass what is expected. I have stayed in many fine places that have done this.
The Grand Hyatt in Washington DC is not one of them.
I booked a Friday evening as I was coming in late and needed to be at the airport very early the next day in order to catch a connecting International Flight. My booking was prepaid, non-refundable, and through one of the popular travel websites. This means that if I don't make it, tough luck - no refunds.
I showed up at the hotel, and was told that they were oversold. The only room they had available was a hospitality suite with a Pullman bed. Since it was evening when I arrived, I mentioned that all I really wanted was a good night's sleep as I had to leave early the next day. I was told that the Pullman would be adequate, the room was large enough to play soccer in, and they would throw in breakfast. Since the coffee shop did not open until 6:30 AM and I had to be in a cab by 6:30 to make my flight, I declined the breakfast - "no problem, room service is available right at 6 AM". OK, I took the offer,and went on to the room.
The room was your typical hospitality room - large, dated and worn but high quality furnishings. And there was the bed - a sofa bed, not a Pullman. At this point, a bed is a bed is a bed as I am about ready to pass out. 
There were no door hangers to mark my order for breakfast, so the next morning I phoned room service. No answer. I went downstairs to the front desk, and they were able to get room service on the phone after some wait. I ordered, mentioned that I was in a hurry (I didn't order anything that had to be cooked) and went back to my room to wait. And wait. And wait.
Finally, I just went down to check out. The apologetic look from the front desk clerk says it all. But it takes more than a sympathetic clerk to run a hotel. 
Skip this place if you are ever in Washington. All you will get is a lot of promises, and some feigned concern. 
Hmm... Just like Washington DC, isn't it.....