I'm sorry to disappoint you, but I'm going to wait to blog about Seoul and Costco until morning. I think it deserves better than something written while I'm half asleep. Also, while large parts of today were great, there were some moderately impactful disappointments, so the post might benefit from the perspective of a good night sleep.
My alarm is set for 8:15 (that's 4:15pm PST). I'll post as soon as I'm up.
Sorry to postpone it, but, I promise, the blog will be better for it.