A few thoughts: The modern monster movie is largely made up of big CG effects and very little character development. Tremors, while not as distinctly "modern" as something like Pacific Rim or Legendary's Godzilla from a few years back, marks one of the last examples of more classic creature features before the modern age of CG and relentless action without consequence or ingenuity. And after watching this again more recently I can say with some certainty that the effects, writing, and structure of this movie are far greater than what comes out today. With its use of miniatures, models and other practical effects, this is one that still stands as an effective and ingenius film. While some of the acting is lacking (I consider this one of Kevin Bacon's weakest performances), the characters feel genuine and keep the story light and intense. It's just a really well-balanced movie, and a reminder of the ingenuity required of filmmakers in the 20th century.
Who would I recommend it to? Fans of b-movies and monster movies shouldn't pass this up. Great effects and a good sense of humor.