The best domestic RCC in my opinion is SFO. It is open and the staff is always helpful. LAX is a close second. SYD has a nice spread of food and drinks. I agree that SEA is not so good. It is cramped and there are not enough monitors. i do enjoy when I fly to Canada and am able to go to AC's Maple Leaf Lounge. The MLL is Terminal 2 @ YYZ is amazing. Heaps of space, beer on tap and pour your own drinks and food, all at no charge.
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"I fly, therefore I am."