It was a nice enough movie. Maybe too short and concise?... You can't stuff/cram 2 plotlines in one movie of that length.
And maybe the monsters that were missing, like Tyrant, Hunters, Plant-42, Yawn, Chimera, Poison Ivy, Web-spinners, Neptune, that's also a minus for the overall presentation of the film.
But all in all, a nice enough movie, with a low budget.