I rented this from the online DVD rental service I regularly use, and the back of the DVD sleeve said that the movie lasted only 84 minutes. When I started watching the movie, it didn't take long for me to feel in pain. I kept telling myself, "It's only 84 minutes long." But the DVD sleeve was wrong - the movie lasted an additional 20 minutes or so. So you can imagine how I felt by the end of the movie.
The movie goes wrong in almost every way you can think of. There is the script, for example. It's pretty dumb throughout, but near the end of the movie there is a ludicrous twist that makes less and less sense the more you think about what happened before that twist happened. Even more unbearable was the character of the professor. He is so whiny, so blubbering, that I wanted to ram my fist into my TV screen every time the movie focused on him.
As for the special effects... they are pretty low tech when compared to effects from Hollywood movies, even with Hollywood movies made as the same time as this movie. However, when you consider this movie had a pretty low budget, they aren't THAT bad - I got the sense they effects artists were trying pretty hard with what they got.