This is the "in name only" sequel to The Twins Effect which is actually a fun romp with some great action scenes. This movie on the other hand is a complete mess.
The acting is awful. The script demands than everyone in the cast act like an idiot and make stupid faces. There's ridiculous scenes such as when a group of men grow breasts or when Donnie Yen (Who plays a character NAMED "Crouching Tiger, Hidden Dragon. Why?) is struck with a love potion.
People may flock to this because Jackie Chan and Donnie Yen have a fight scene, but it's a waste. It is such a derivative copy of Donnie's fight with Jet Li in Hero, that it's face-palmingly stupid. Key scenes from that fight are copied shot for shot because the film makers couldn't be bothered to be more creative. The rest of it is choppily edited and shot too close.
There are much better Chinese films that deserve an unaltered US release like Wu Xia, Woman Knight of Mirror Lake, and the underrated Wind Blast. Releases like this one just continue to give the false impression that Asian films aren't worth the trouble of bringing to the US.