Great place to stay
Location is great and nice and quiet, you feel like you are out in the woods, but it is actaully just a few minutes from the airport by their free shuttle and there is a free shuttle to the Light Rail which can be taken into Downtown Seattle or you can take Seattle's bus system to anywhere you could want to go. I would recommend getting an ORCA card, it makes paying for bus fares much easier. 
Free breakfast is pretty good and the free ice cream, string cheese, malted milk balls, yogut and bottled water is amazing :)
The room was nice and quiet, maybe a little on the small side but perfect for relaxing and watching TV after a long day exploring Seattle. The bathroom is huge, and has a very big tub/shower.
Everyone there was very nice and very helpful.
We will definitely be staying at the Cedarbrook again!