Still, it is much better than I anticipated, and a lot of fun to watch as it is pretty much a 1950s B-movie in plot and a 1970s eco-terror film in style. There isn't any letdown in action in this rather compact thriller, and not any moment was I bored. It's also nice to see David Keith use his considerable character-actor screen presence here, playing the part that would have gone to Patrick Wayne 25 years earlier, and doing it well. Everyone else is fairly adequate, though not at all outstanding, and perhaps it's because they're not supposed to upstage Keith and the creature. Though the creature effects are significantly lesser than what we now see from big studio productions, they are as good as many old-school animated or matte-effect creatures from 30, 40, and 50 yrs earlier. In the consideration of the time difference, this isn't much of a complement, but if this film can be enjoyed by a viewer on the level of such b-movies as, say, Monster that Challenged the World, it will be good entertainment.