Hello Monster: Remember You is one of my favorite KDramas, where I loved the entire cast, as well as the chemistry between them. So I started this with some reservations, despite my overall love of lacorns.
In the Korean drama, while I love Jang Na Ra, her character was pretty inconsistent. At least she looked and acted like a confident knowledgeable detective, tho. In this one, the actress is simply too young. She doesn't have the gravitas for the part. The character remains the problematic mess it was in the KDrama, as well.
Our profiler here is not Seo In Guk. But he's otherwise excellent - fits the part, does the job, and I very much approved of him. Same for his brother - not Park Bo Gum but still you're rooting for him LOL
The police team are fine, and I actually prefer the head detective here (boss' son). Of course the KDrama DID have Kim Jae Young, but I thought Best Vichayut Limratanamongkol was just as gorgeous in fact :D
Where this REALLY shines is the casting of our main bad guy! Now, I thought D.O. just nailed his part as the younger one - chilling! Choi Won Young as his older self is excellent, of course, because CWY is one of THE best Korean actors out there. However, in the lakorn, OMG the younger & older actors LOOKED so much ALIKE! Same facial expressions, mannerisms! Totally chilling, both of them! Because of this, it really felt like you were looking at the actual younger/older versions of the same person! This was just amazing to me and really made this version totally worth watching :D
The story line is a bit more difficult to follow here than it was in the KDrama, I feel, but since I already knew the story I can't tell how problematic that would be for someone unfamiliar with it.
Overall, this remake is totally worth watching, just as every other lakorn remake of a KDrama that I've seen!