I found the film to be pretty disappointing. The visuals were incredible but...that was it. I found the plot to be predictable, full of convenient coincidences and overall not very engaging. I didn't like the characters that much and found one the main guys to be completely insufferable. The female characters and Vietnamese were also very stereotypical and one dimensional.
There was one scene about midway through the movie that was very intense and I really enjoyed those 3 minutes. Also the score was pretty good.
But I think my viewing of the film just comes down to personal preference. I recommend you see it for yourself because a lot of people seemed to enjoyed it.