Old. Convenient Location. Old. Loud.
The hotel is in a convenient location fairly close to the white house and other major attractions like the convention center. Staff are very helpful.
Everything about the hotel is old. When I checked in they mentioned they wll be going through a remodel soon. I really wouldn't recommend staying here until it happens. the only reason they got a 3 vs. a 2 is the staff is really helpful and the hotel was super clean.
Rooms and bathroom are small. Everything but the TV seems old and a little worn.
You can hear things from the hallway and despite being on the 10th floor you could hear lots of outside noise including many police sirons. There was definitely a lot of police activity in the area as well as ladies of the evening and homeless people very close to the hotel but that is the same for many hotels in DC. 
What I like about the place. The staff are help helpful, Do not get Pizza at hotel bar. rally bad.
I usually have to stay at this hotel because of a work conference if you are looking for a simplier alternative there is a Hilton Garden Inn right down the street. You ca often get several other hilton properties for the same price as the crown plaze (just not during a large conference).
There is a great build your own breakfast, lunch noodle place right next door. really good food, very reasonable price. Hotel has a shoe shine guy at the back side of the hotel. he does a really good job and there is a Starbucks onsite