I got to this hotel from Union Stattion, the main D.C. train station, via the metro and the Hyatt's shuttle bus. As a front desk person described, you pick up the metro in Union Station and with one connection you get off at the Crystal City metro stop. As there is no marked stop for the Hyatt shuttle bus, this is a little vague but it works. Go to a nearby side street where all the city bus stops are with electronic signs. The Hyatt shuttle bus (clearly marked) stops at the head of this line of city bus stops. So if you wait just beyond the bus stops, you will be good. The shuttle comes by every 15 minutes during the day. The hotel is only a couple minutes drive from here.
I had a beautiful, relaxing room on the 18th floor. The decor was soothing with a lot of greys, browns, and blacks. The bed was comfortable and I appreciated the extra blanket in the closet.
The staff from the shuttle drivers to the people who work at the front desk and housekeeping are all very pleasant, helpful, and energetic.
The breakfast buffet was very good. I especially liked the variety of oatmeal toppings including 2 kinds of nuts, granola, dried cranberries, and raisins. The only thing I think Hyatt can improve about their breakfast experience is to have newspapers readily available. At this hotel, to get a newspaper to read during breakfast, you have to initially go down to the first floor to get the paper and then back up to the 2nd floor for breakfast. This seems to be the case at other Hyatts I've stayed at as well.
Nearby walkable places to eat: There is a Legal Seafoods and a Chili's that are both a 10 minute safe walk from the hotel. I ate at the Legals one evening sitting at the bar. Excellent food and good company. For a quick sandwich, I recommend the Clark Street Grill right across the street from the Hyatt. I went there for a lunch a couple times. The food is good and comes out quickly.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.