Expect a genuinely warm welcome (and not too much else)...
I booked a room for $54 as I walked in the front door of the hotel using hotel tonight. The check in guy was beyond personable and helpful, he really impressed us with his genuine concern for our comfort and interest in our travel plans. I totally agree with the quote from their head housekeeper (featured on the home page of the hotel website): Expect a genuinely warm greeting when you stay with the Red Lion Hotel Seattle Airport.
Pros: The free wireless internet was a plus and the free shuttle to the airport a life saver. They have a huge and rather secluded indoor hot tub in a cabana type building by the outdoor pool. 
Cons: That said, the place is a bit shabby and run down, a far cry from the much newer and posher Red Lion in downtown Seattle. 
Our room was 325, as far as humanly possible from the elevator. It was a corner room and quite spacious, although the bathroom was still dark and cramped.