Will be good on a free and is Korea's captain so that say's something considering they have some capable players. He is quite physical and has a good eye for goal. IMO, not necessarily Kessie's back-up but could fill the DM role since he can play anywhere in the middle.
This would make Mont ,and possibly Biglia , surplus to requirements. We have to beat off other EPL offers though I've read. And a side note, good for the Asian market.