I've visited Vatos a couple times during my current stay in Seoul, and it has been a real treat both times. The Korean-Mexican fusion menu is unlike anything I've seen anywhere else. You'll read about the kimchi fries from others, and they are every bit as good as everyone says--layers of fries, cheese, meet, kimchi, sour cream and chopped red onion, and a nice zingy topping. Very generous serving, plenty for two or three people. Don't miss it. The tacos are packed with all sorts of goodies, the right size so you can pick it up with one hand. (Best fish tacos this side of Newport Beach, CA, by the way.) A fun selection of beers and their signature "Vatos-rita" with a upturned bottle of beer or cider in a margarita will put a smile on anybody's face. Prices are very reasonable--the whole business including beverages and dessert for about $20/person. Make a point to seek this place out--Itaewon, exit 1, go straight until you see the KEB bank in front of you and turn up the steep uphill driveway just to your right. There it is. Friendly, attentive service and a lively youthful atmosphere make for a very enjoyable experience. Vatos has a great thing going here, and people have found out about it. Call a couple days ahead to make a reservation.