This is a classic in the way that it is one of my litmus tests for B grade movies. If a B movie keeps my attention like THEM, a movie about giant radioacvite ants, than its worthwhile. It has a rather stock plot, giant mutant ants reign terror, theres a small windo of hope to stop them and save teh world, blah blah. However theres an oldschool sort of charm to THEM. Its up there with the original "the thing" and "war of the worlds".