Welcome to Korea!! Not only is there free wifi but there's also an internet cafe where you can relax with a big desk and comfortable seats. I would advice to carry a personal small transformer fit for your phone or laptop since they don't provide those there. The cafe doesn't have a time limit and its only restriction is bringing in outside food or beverages. Speaking of food and beverages, there are plenty of places to eat here including food courts. For those who prefer American franchises, you can get them here. I haven't explored the whole entire Airport from Gate 1-14 (pretty decent sized airport) nor all the 3 floors but I did find a Jamba Juice, Dunkin Donuts, McDonald's, Quizno's, Subway, and a Baskin Robbins. If you are a shopper, you can find a duty free with nice brand name items from cosmetics and perfumes to apparel and gifts. There is also entertainment here. The day I arrived was a live Opera show and it was really nice and lively. Overall, I give this Airport a thumbs up for cleanliness, easy to maneuver in, excellent customer service, friendliness, food, and entertainment.