The driver/guide Mr. Kang was already waiting for us after we got out of the baggage claim area. He waited for us as we were renting out mobile wifi devices. He spoke English, the car they got for us was big enough for 5 people and 5 luggages and clean as well. He didn't know where our AirBnB accommodation was, but he looked it up himself and he took us there with no problem. It's a bit pricey, but after a long flight and going with a big group, it was worth it. Highly recommended.
The very courteous driver and car were waiting for me at the airport on arrival and the trip to the hotel, whilst long due to traffic, was expertly and efficiently done. There are cheaper alternatives, i.e. bus and subway, but the door to door service and hassle free nature of the transfer was well worth the money
Everything except the insane traffic was PERFECT. Exhausted after a 14 hour flight, our driver, with my name on a sign was waiting for us. He just took such good care of us. He was kind, professional and safe. He kept us informed during our ride to our Hotel in Seoul. There may be less expensive options, but this was worth every dollar spent . So easy!!!!