I travel in Seoul for 11 days and buy 3day DSP. So I would say it is worth it. But, if you are planning to buy this u can first see which places u want to visit and do the calculation before. This pass is beneficial only if u stay long in Seoul and don't know where else to go. Otherwise it would be a waste of money. Most places that they cover is not a must visit place for example alive museum, it was something that u can easily find out of Korea. Good point is, tickets redemption are easy and fast