Staying 4 nights for $89 a night in a room that's the size of a small house just can't be beaten. Everything feels new (and the mall outside has a number of units that are still waiting to open), the equipment worked flawlessly, the bed was super comfortable, the bathroom was clean the complimentary coffee provided was excellent and the staff were friendly and attentive. Even at double the price (which I think is the normal rate) this place would be a bargain.
The breakfast was a standard hotel buffet. If I have to quibble at all, the "shop" that sells beers, chips and ready meals is very expensive - If I was doing it again, I'd walk across the car park to the Reymans store that opens at 6am and buy everything there at 1/3 of the price.
But don't let that put you off, this was a seriously good hotel at a bargain price.
One thing. I arrived at Dulles at about 10pm and waited for their shuttle bus - which didn't arrive. It appears that you have to call the hotel first to get them to come out. My fault, not theirs.