Originally Posted by
Noodlesz
Thanks for the replies.
In summary, looks like I can just take my bags out of the airport without rechecking, and there is no security check after customs again.
Except at Seattle I need to take a train to exit, as opposed to most other airpots where I just walk out.
Correct - no security check if you turn to the right after customs to head to the train. Passengers who keep left after customs to reach connecting flights have a security checkpoint.