Can't make up my mind about this...
For the past few days, every time I have used the Seoul subway from COEX Station (삼성역) I have passed this advert for Baekseju. Some days I like it, others I think there is far too much information.
As it is quite likely that people standing near the advert will have to wait for a few minutes before a train arrives, I guess the advert works. But I really am not sure.
I like the design though.