How bad is it? It's probably Don Dohler's first and best film... so quite bad.
Should you see it? Yes. It's the textbook for low-budget films.
Creatures meant for a galactic zoo end up escaped on Earth and must be rounded up; one of the three is good, the other two evil - but which?! One is sort of reptilian, one a Wookie created by kindergarteners, one kind of oozy with claws. The sort-of stop-motion one is transparent for much of the film, due to cost. The chase by a guy lumbering in an awkward costume is fun for a while. Most of the film was shot in bright daylight to save on lighting, the acting is pathetic, the music is grating and the film drags. Still, for the East Coast's answer to Ray Dennis Steckler, the film is moderately entertaining.