The Sky Club between A&C in Seattle is beautiful, and hands down the nicest domestic lounge in SEA. Better than the Centurion Lounge IMHO.

It is also the one of the nicest, if not THE nicest Sky Club in the network. Delta's desire to establish Seattle as it's east Asia US hub, and the desire to poke a stick in Alaska's eye while doing it, is no doubt the reason Delta has invested in such a great domestic lounge. Seattle is by far Alaska's most important hub, and hopefully the new lounge in the N satellite terminal will reflect this. But as of now I would think most objective observers would say Sky Club A&C is the nicer experience. I will miss visiting there after Jan 1 of next year once Delta puts in the must fly Delta requirement on Sky Club visits.

Also, I really enjoy the bar in Alaska C Lounge in SEA. It is the views of the operations out the back of the bar that gets me returning to that location.