Stayed here for 9 nights (during Presidential election) and enjoyed the hotel, staff and location greatly.
Booked a Fairmont Signature room - very spacious, clean, well decorated and tastefully furnished. The room only had a bath (small) with overhead shower, but was perfectly usable.
The Concierge staff and waiters were extremely helpful and polite - front desk a little frosty but nothing too disappointing.
Food was good, but not exceptional.
One observation, was the corridor leading to room (well certainly on 4th Floor) was worn and toed, with many scuffs, scrapes and marks - not a massive issue but a small disappointment.
Overall a good hotel with a helpful team, quality rooms and a good location. Certainly would come back when back in DC.