His acting isn't that good based on the first episode. he's just saying out his lines no expressions at all. But it's his first role so not that bad for someones debut role.
people criticizing her for her performance in BOF when Lee Min Ho's acting wasn't that good either. Amway I liked her acting in Blood. Also BOF was over 10 years ago she's obviously going to change since then.
US movies he's been in
Unbroken
Stray
Maleficent: Mistress of Evil