I was at Washington Plaza for 1 night only. The experience was good in general. The bed was comfortable, the room clean and there is complementary wifi. The room I got was a bit noisy due to the DC traffic and also some weird loud noise every time the heater came on. I'll blame that on the room itself and since I didn't ask for another room, I won't hold it against the hotel.
The location is pretty good, Thomas Circle is very lively and there are a number of restaurants in walking distance.
I pretty much got what I paid for, a nice room, with a nice bed for me to spend a night in. No complains here. The staff was very polite and pleasant as well.