Granted, this 2007 Hong Kong movie is listed as a comedy, action and crime movie, which is essentially also what the movie does have, along with a dash of comedy. However, the movie just had a hard time making up what it wanted to do and in what direction it should go. Well, not the movie as per se, but director To-Hoi Kong.
The storyline in "Twins Mission" (aka "Seung ji san tau") is a bit of a scrambled mess and somewhat of a mixed bags of nuts. Certain parts of the storyline are interesting, while other subplots are just fillers and really clutter up the movie unnecessarily.
"Twins Mission" is adequately paced, but the storyline just felt wobbly and was a bit all over the place, which ultimately led to the movie ending up feeling like a mediocre movie at best.
Even with a cast that included Sammo Kam-Bo Hung, Gillian Chung, Charlene Choi, Wah Yuen and Sam Lee, to mention but a few, then the movie didn't fare all that well. I suppose it was the writing of Siu-Ming Tsui and Sai-Keung Fong that sort of had the movie going in every single direction all at once, and never coming full circle.
If you enjoy Hong Kong action comedies, then there are far better choices readily available, as "Twins Mission" was but a mediocre addition to the genre. While the movie could be watched, it is hardly a movie that I would recommend you spend your time, money or effort on.
My rating of "Twins Mission" lands on a mediocre five out of ten stars.