inattentive staff, awful experience
I arrived at the Washington Hilton at approx 12:30am. The woman who checked me in was slow and disinterested. I asked about helping me confirm a tour I had booked for the next day, I was informed that there was a phone in my room (I'm from Australia and didn't have a mobile phone). I then went to the concierge desk where I was told the tour company had a desk down stairs where I could speak to someone when it opened at 7am. After a few hours sleep I was downstair at 6:55am, where I waited until 7:30am. 
The room was poorly cleaned prior to my arrival. I had to leave a note for the cleaning staff asking that they clean the previous guests stains off the toilet bowl (I would have called but it was after 1am) and call guest services to get them to replace the ice bucket because the previous guests melted ice still in it and the glasses had been used. 
After a big day out (yes eventually caught the tour) I order room service - the macaroni and cheese and 'braised' 'short ribs'. I was boiled meat (not ribs) that was inedible it was so dry.
I was so looking forward to staying in this hotel and was very disappointed in every way.