"For bad boys only" suggested with it's title as a fun flick to deliver. The cast was great and director had put them adequately throughout the film. However, some flaws in this movie produced a non-perfect film.

When the movie started, it gave the audience some character introductions, which delivered a great intro (first thing you will know is that this film must be fun to watch). However, when the introduction was done, everything slowed down. The mood of the movie suddenly vanished. Later, we were introduced to another character named "Tin Ai", to find his lost girlfriend named Shadow. That's when the story started and the mood of the movie is back, or the "plot" of the movie to be exact. Then, as we followed along the story, we then introduced another lost love (who looked exactly like Shadow). Here, biggest disappointment and the movie returned to the "down" mood produced earlier. The whole idea of this "another lost love" subplot was only to make a lesson for Jack. There supposed to have no relationship with the main plot itself and could have been left out to make this movie more entertaining. Overall, the flow of the movie is quite unstable, or should be said as "rollercoaster", which resulted in not that fun to watch overall.

As for the performances, I personally think the director had put the actors well in placed. Ekin Cheng and Louis Koo as bad boys' leader, well, they looked like real bad boy anyway. Also, their assistance, Kristy Yeung as Queen was suitable, too. Shu Qi as two lost loves and another clone was a good one. However, the dub of each character was different and sometimes uncomfortable to listen to. Besides that, Shu Qi had a good role here and she did her job by express her acting. As to other supporting/guest cast, were also suitable in placed, especially Mark Cheng with white hair as the Japanese, it was good.

In conclusion, "For bad boys only" did gave the audience a good packaging with the cast but a few disappointments inside, resulting not as much fun as you may thought. Here in this movie we don't have a problem with the cast but the problem with the flow of the movie itself. The story could have be more excited if the story stays with itself (subplot I mentioned above). Other than that, the movie is still watchable and occasionally fun.