It is easy to reach to certain tourist spots using metro. The train is fast and efficient. The ticket can be easily bought from the machines which has English languange options, but it will be much easier to use T-money here. I used up almost 15000 won of T-money for three days (11 times of using metro including back and forth to Nami Island). Whenever the metro is approaching a station, the will be the station's name appeared on the screen as well as voice telling which station it is in Korean and english languange.