The Marvel comic this is based on was never my favorite, but it had a goofy charm all its own and the interaction between the characters made it stand out from the rest of the pack. The same holds true for the movie. There’s no real “plot” so to speak (they get their powers and learn to work as a team to fight Dr. Doom), rather the movie is dictated through the characters and not the story, which is refreshing.
The cast is great and there’s a good chemistry between the stiff ass Mr. Fantastic and the coy Invisible Woman, as well as between the upstart Human Torch and the take no shit Thing. The movie’s only real problem is that McMahon actually becomes less interesting when he finally changes into Doom (He basically is the same smartass in a metal suit. C’mon Doom should be menacing and evil!) and the climax is wrapped up way too quickly.
Fantastic? No. But a damn good time nonetheless. If you like this, check out the infamous Roger Corman version.