L7 is excellently situated near the tourist hub of Myeongdong. More importantly, it's central to many of the attractions around Seoul - N Seoul Tower, the palaces, Insadong, etc. Also located near multiple metro stops to get around.
The rooms are clean and fairly spacious; the beds are wonderfully firm, the staff courteous (they allowed us to check in an hour early) and helpful (eg umbrellas) . It's also over top a ramen shop for late night munchies.
So far our go to property when staying in Seoul.