Great unless you require sleep
Before I start my review I need to preface it by saying I had an awful experience here. That being said, my review and rating is not reflecting that, just the property itself. Because its still not a 1 despite my bad experience, just not as nice as other Hiltons.
Positives: 
Great location, walking distance to White House, easy walk to Blue, Orange and Red line metro stations.
Big meeting spaces
Executive floor and lounge
Restaurants and bars on site, nicely laid out, and aesthetically pleasing when you walk in
Cons:
Paper thin walls, truly one of the nosiest Hilton hotels I've stayed at in a long time
Obnoxious housekeeping staff - The housekeeper on my floor started at approximately 8 am even on the weekends and basically threw every door open and closed so that it slammed shut at full volume. Given the lack of sleep from the thin walls it wasn't appreciated. They have a job to do, but slamming doors is unnecessary.
Parking was full (42 dollar valet and they don't even have capacity for a weekend crowd?)
This is obviously something that wouldn't happen on a normal trip, but my last day I awoke to a flooded carpet inside my room and the extremely loud sounds of machinery in the hallway. I never found out exactly what happened, but there was some sort of flood in one of the wings of the hallway. Truly the icing on the cake of a stay of virtually no sleep. The location of the hotel itself is great, but its safe to stay I will never stay here again because of the thin walled rooms.