It's definitely a mediocre move. It's obvious there was a lot of work put into sets, costumes, and locations - although I did find it funny how they couldn't really decide what "Asian" actually was... it was fantastical enough that it wasn't jarring though. It's a shame the director doesn't know how to shoot action scenes well. The choreography actually looked half decent but it was so hard to actually see much of it, too many cuts and changing angles. As for the actors, all the supporting cast I felt did really well. Cage is just... well... yea... Cage... can't be anything except himself apparently. Christensen on the other hand, I feel like has come a long way since Star Wars (I think Jumper is the only other movie I've seen with him...) For the plot, I think the only time I was just utterly confused was right at the end. The final confrontation didn't make a whole lot of sense. The classic "don't let their deaths be for nothing" tropes with a perfect defensive layout.... that wasn't used... instead of using the caves the few left just walk out for the finale like all the deaths meant nothing..........
So overall, not enough to make me stop watching, but nothing exceptional.