I loved this movie as a kid and watching it now, it still has it's charms. I liked the concept of the film, in which a meteorite hits the Earth and brings basic single celled alien lifeforms in which they evolve rapidly. Sure, there were a few times where the movie slows down and you want to skip it to get to the good parts, but the move was entertaining from start to finish. Once the monsters starting coming out into the public, it just got better and better. The climax, in which the ultimate monster arises, felt strange and didn't feel like it fitted into the rest of the film. Since there was all that build up with more and more complex monsters and then suddenly we have that thing. The special effects were well done and not over the top. While some of the humor was crude, the movie was funny and enjoyable. There were some classic scenes and dialogue. The Head & Shoulders advertisement at the end was weird and seems tacked on. The ending overall feels low quality and rushed. If you don't take the movie seriously, then it's a fun ride.