I'll repost what I said on another forum:
MONSTERS is one of the most boring "monster" movies you will ever see. There is one JURASSIC PARK-like scene, when their caravan of cars get attacked. Otherwise, it's all just a backdrop as the lead guy and girl spend too much time quibbling while trying to hike back to the U.S. border.
What I do have to credit the director with is doing his own FX that look as good as anything Hollywood could put out. No exaggeration there, as the squids, I mean, monsters look real. Just as impressive, is how he puts a car in a tree, a crashed helicopter on the roadway and a jet fighter turning over in a river. They look fantastic.
The crew was just the director (Gareth Edwards), a soundman, line producer and a translator, plus the 2 main actors. They travelled through about 5 countries and though the production is spartan, I think $15,000 is an exaggeration. If I told you to shoot in 5 countries, with 6 people, on 15 grand, could you do that and have anything left over for actual filmmaking???? Any amount close to that is still very impressive, though. There is a nice little featurette on IMDB:
MONSTERS featurette
As you know, little movies like PARANORMAL ACTIVITY and BLAIR WITCH look cheap, but deliver a scare. MONSTERS is the opposite - it is brimming with quality, but there are no scares, save for some tension in the caravan scene. CLOVERFIELD this is not!!! This movie is about 6 monster attacks short of being an actual "monster" movie. It does look great, though - authenticy of the locations, the actors, fx, etc.
The director gets huge props, because Gareth is capable of making anything, and I mean "anything." This guy must be some sort of genius prodigy. Even more impressive is his work on BBC's ATTILA. You want to see "amazing?" Check this out:
https://www.youtube.com/watch?v=1IK1WJ-oveE