Great Hotel, Great Location - NO Free WiFi !!!
The hotel is very well located, close to Dupont Circle and you can walk (less than one mile) to either the White House, Lincoln Memorial or Georgetown. Not exactly close to a metro station (10 minutes walking, at least) and also far from Union Station, so keep in mind when arriving/departing or if taking sightseeing tours. Amenities are pretty good, as you can expect in any Embassy Suites. 
Be sure that you take advantage of the breakfast buffet and the drinks at Manager's Reception (5.30 to 7.30pm), otherwise it is hard to say that the USD300+ that you will pay per night are worth it. Staff is great, especially the ladies serving drinks. 
The only con is that I find difficult to believe that WiFi is not free in the whole hotel. They are suppose to charge c.USD10 per day per device, so keep in mind if you really need to work in your room or traveling with kids addicted to e-devices... alternatively, it is free in the lobby, but as you can imagine is not particularly nice to spend long time there... It is hard to believe that the hotel can offer free drinks, but not WiFi, when even less expensive hotel chains offer complimentary and unlimited WiFi in the rooms. 
Other than this, it is a highly recommended hotel.