Excellant
I liked everything about this hotel. Because it is actually located inside the airport itself, I was able to save a days rental car fee by turning the car in the day before departure rather than on the morning of departure as usual. 
In fact due to the location, everything was quick, efficiant, and painless. The inter terminal airport train stops at the hotel, so the distance from your hotel room to the check in counter is just a few minuets allowing you to sleep later, take your time and have have a leisurely morning workout, shower, breakfast, etc rather than the normal rush routine which was a wounderful refreshing change of pace before my long flight to Tokyo.
The staff was absolutly fantastic from the second I got off of the elevator at the front desk to the second I got back in to go to the terminal.
I had dinner and evening cocktails at the flight lounge located on the top floor which was excellant, the cheerful bar staff was very entertaining.
The room although a bit dated was extreamly comfortable, well maintained, and well appointed staying true to the Marriott standard. The mattresses and pillows at upper end Marriotts are some of the best in the industry and this was no exception. like sleeping on clouds.
They have a great workout facility, and the buffet breakfast was superb with made to order omelets, fresh fruit, and great coffee.
I can't think of a better way to spend the night, before a long day of traveling, will deffinetly be back.