Visually nice Excellent 3D CGI graphics with 2D character animations. And it works. Story is OK and characters are lifelike, but that's about it. The creators used too much stereotypical background story between main characters and the lead woman character becomes too typical weak female, which was rather disappointing. Jay's character could have been better but instead they resorted to go the easy way. This is too typical of Korean movies..
Also, in some points I would have liked to see more of the 2D animation and character interaction when the director seemed to prefer showing off with the 3D animation.
Anyway, worth the watching.