ICN also has some of the best, and most reasonably priced internet kiosks of any airport in the world. The KAL lounge used to have free ones, but they were gone last time I transitted there. But there is an excellent internet shop sponsored by Intel and Dell that has excellent new PCs, and costs around $3 for an hour via broadband.

And the KAL lounge has big soft couches with a large screen TV, and a place to shower and get a theraputic massage for reasonable cost as well.

Overall, ICN is about the best airport in which I've ever had to spend a several hour layover.