Well, I think that the title will probably say it all. This isn't a great film, and loses its way sadly towards the end and conclusion. It's not going to appeal to anybody who isn't interested in the genre and so willing to forgive its shortcomings. It harks back to such as Outpost, Dead Snow, Bloodstorm, and so on.
What it is, is an enjoyable, competently made WWII based horror. It's well enough shot and designed, has a few mild shocks and a little gore, and heading out to the Pacific theatre is a nice change. All involved have done their best rather than slapping together a piece of insulting cr*p (Stand up and take a bow, Nazi Zombies)and in large part it's competent and enjoyable. Sure, it could have done with a better resolution, but on the whole, if this is your thing then it's worth a punt. £4? Yeah, that's a reasonable price.