On my way to Williamsburg, Virginia I had to spend a night in DC (technically Arlington, Virginia). I chose the Hyatt Regency Reagan Airport because I arrived late and wanted to get right to my hotel.
I have been to many Priority Pass Lounges. The Priority Pass Kathmandu is by far the best I have been to in terms of food.
I've flown Air China business many times. It is underrated. As part of the ANA RTW ticket, I maximized my 22k miles in business by adding the final Chengdu to Kathmandu segment.
Apart from the convenience of the subway, this hotel is not in an ideal location. There is nothing around it except construction.