Stayed at this hotel for 5 nights and couldn't really fault it.
Shuttle is complimentary and runs very frequently.
I liked the restaurant quite a lot.
If you wish to kill some time, go to the Aerospace museum. To do this you could ask for the hotel shuttle to take you there and collect you from there. All complimentary.
Walmart is opposite this hotel which is only 3 minutes walk away
To get into Central Washington - take airport shuttle and go to the airport. From there take a bus to Washington. I do not remember the timetable but you could ask Hotel shuttle driver whom will surely help.
I will highly recommend is hotel for 1-5 nights stay if you happen to be in or around Dulles airport area.