The film starts with a big hullaballoo about global warming which, whilst justifiable, is a little confusing. When it gets down to the action though, I found it pretty good. The basic plot is that there are some researchers out in the Arctic; they find a bear eating something; tranquillise it, and then mysteriously get ill. That's the start. Then there arrive some student ecologists expecting to find these researchers at the base camp. The chief researcher's daughter also comes despite his having told her not to come.
It's not spoiling much to say that the mysterious cause of the sickness are prehistoric 'vertebrates' which have hatched from frozen eggs in the carcass of the wooly mammoth that the polar bear had been eating at the start. Anyway, these bugs are pretty pernicious; getting under the characters' skin in 'The Mummy' style.The rest of the film is mostly the 4 students dealing with the bug problem inside the research base, which gives rise to some fairly gross scenes--although retrospectively the 'ick factor' could have been higher. If you're not a bug fan, the film will probably succeed in unnerving you a fair bit. I found myself swatting at a fly a little apprehensively half-way through the film!
If you like horror movies, and especially 'biological' horror movies, this will be a good one to add to your repertoire. If not, I'd just rent it. The acting is ok, though I didn't really connect with any of the characters. There are some grisly scenes, and some moments where you will be shaking your head at moronic decisions, but all in all it's not a bad film.