The Thieves is a South Korean movie that will demand your full attention.
The good. An ensnaring story line that will push you to see it to the end with a ever greater astonishments. The scenario is incredibly well built with plots within plots, revenge, love, distrust, and new twists at every turn. No character is safe from death. A Ton of action. Good editing and camera work. Nice sets.
The bad. A few cliché. Shallow motivations.
The ugly. The afro-hair Chinese thief who's not a very good actor.
The result. Great entertainment, but don't expect any depth.