Each season symbolizes a certain type of cuisine for me and without a doubt, Korean it is for the cooler season. Think hot pots and barbeques, both providing warmth to the surrounding diners patiently awaiting for it.
ChangGo is one of the many places I have read good reviews on but also one of the few that I hesitated due to their no booking policy which often leads to long waiting times. Service is quick although probably could improve on in terms of attentiveness during busy periods.
Overall, it is a good place to get your feed's worth although bear in mind that the queues can get insane during peak hours. On the plus side, staff don't hurry you to leave nor is there a time limit which often occurs at busy establishments.