Great Location but just so, so.
I am a Marriott silver member. Stay in Marriotts about 35 nights a year and they are my chain of choice. I stayed here for 35K points a night.
This hotel has a great location. 5 blocks from the National Archives, 4 blocks from the various Smithsonian museums, two blocks from the mall and White House. Shopping and restaurants are close.
I have stayed in 3 other JW properties. This one is my least favorite. It is not a bad property, but in my opinion more like a regular Marriott than a JW.
I will include some pictures and you can be the judge. 
The check in and staff are good. The room is a good size for a city hotel.
Here are my dissappointments.
The bathroom is tiny (picture included). You would struggle to fit two people unless someone was in the shower. There is no other place to get ready in the room. There is no other mirrors in the room even if you wanted to try. I can't imagine how challenging this would be if it wasn't just my wife and I.
The "refreshment center" in the room is a joke. (picture of this as well as the accompying letter is included). Our fridge was literally just sitting on the floor (picture included). You can't use it to store anything else because of the sensors. (picture of the warning letter included). Do not touch anything or they warn you that you may be charged. Not a problem if I am staying at the Fairfield Inn. I expect more from a JW. This is simply embarrassing for them.
PROs
1. Location, location, location
2. Good staff
3. Very comfortable bed
4. Good room size for a city hotel
5. Starbucks in the hotel for bfast.
CONs
1. Not up to JW standards
2. Unreal small bathroom
3. Embarrassing refreshment center in room
4. No free Wifi for normal guests or Silver members