Dustin Nguyen mashes up genres in Once Upon a Time in Vietnam.Roughly 110 minutes of screen time is brought about by tedious storytelling. Most of the major characters end up with enough back story; however, the pacing tends to bring out more drama than necessary, leaving the buildup to the finale with a not worth it type of feeling. With that said, there are a number of plot twists that come about.There is an abundant amount of CG and green screen, which is mediocre at best. The action, while showcasing some good choreography, is stymied by a lot of slow motion and even some dark lighting.Dustin Nguyen is stoic, but that does fit his character. The beautiful Thanh Van Ngo puts on a show when she gets in on the action. Thai Hoa's got a funny personality, along with Ngoc Diep, although the latter is a waste of a character.Once Upon a Time in Vietnam has some things going for it and things that don't. Add it all up and it's a film to watch once.