DO NOT STAY HERE!!
DO NOT STAY HERE! We stayed here in mid-May with a large group of students visiting Washington DC. It was our worst hotel experience ever...by far.
There was an intense bed bug infestation in Room 317 the first night; bed bugs were on the walls and sheets with both occupants waking up with multiple bite marks. AGAIN, bed bugs were present on the SECOND night, in Room 320, after all rooms were supposedly checked and treated. Other rooms showed previous bedbug issues on linens. 
There was a great deal of exterior noise --- front had noise from trucks starting around 4ish and back had noise from trains. Bus parking is also extremely difficult, even though the parking lot is gated; there is simply not much room to maneuver.
 The cleaning was nonexistent in some rooms --- some rooms did not have new sheets the 2nd night (AFTER the bed bug issue) – beds were simply remade; one room was skipped entirely and they did NOT put the do not disturb/clean sign out – no trash taken out, no clean towels, nothing.
Upon arrival, another room had to ask for a new flat sheet because it had several large stains on it. The new sheet had a cigarette burn hole on it.
When we checked all of our rooms for bed bugs after the first night, we lifted mattresses and found food particles in between the mattresses in multiple rooms. Filth was common behind the beds also. One bed had a broken box spring.
Room 306 smelled like cat urine (previous infestations and treatments often smell like this, acc. to internet sources) when they walked in so they had to be moved to another room (315), which smelled of vomit.
Bottom line, this hotel was a nightmare. Our travel company worked for months to obtain a partial refund for our stay. After the fact, the hotel said they made some changes in the housekeeping staff. The manager did give us large plastic bags (on our request) to wrap all of our suitcases in (so we could try to contain the bed bug problem on our buses). When we bring student groups back to DC, we will never, ever stay here again.