I've been going to the HI Seattle for years, always had a good stay before jetting off to SeaTac for a flight. Front desk staff was courteous upon arrival and since I'm a PC Ambassador member I received drink tickets, discounts at the restaurant and other perks. I usually pick a 1BR suite-not too big, not too small for my tastes.
Usual HI sundries in the room, bathroom, living area, sleeping areas were kept extremely clean. Beds were comfortable. Location is not bad taxi wise, but IMHO watch out for the "private" Town cars as they can charge you exorbitant fares. Best bet is to negotiate trip cost beforehand.
Overall, a great property to stay at. I'll be back.More