The basic concept of CTX is extremely impressive.The lead actors Suk-Kyu Han, Song Kang-ho and Choi Min-sik steal the show with their powerful performances while Hwang Jung-min too impresses in a cameo.The background score and sound effects are very impressive.The action scenes are well choreographed and also entertaining.The film has good production values.A lot of plot twists and thrills are pretty impressive.The climax is excellent.
Negatives:

Yunjin Kim's performance is just fine, and for the most part it's not very impressive.Even though the action scenes are decent, they are not filmed very well. Too much of shaky cinematography during a few action blocks spoils the impact slightly.Editing is another major negative as the film could've easily done away with some 10 minutes. The romance subplots only add to the length. It was difficult to finish this film in once only due to the editing.
Repeat value: Can't say

SWIRI is an entertaining action film with some decent plot twists and overall entertainment, and further worth seeing if you love action films. But that factor too can act slightly negative since the action scenes are just fine and don't really hold a repeat value, though a few action blocks are done excellently too, at the same time.