Ok my headache is dissipating, so I guess I can write some more. SPOILERS:
The problem was this; to me it was nothing more then a cheesy love story deep down. Rob is pretty much on a quest to rescue some broad he nailed across a city being rampaged by the monster.
You really have no idea what's going on with the movie unless you checked all the little websites, clues, etc. circulating the web. The main character is apparently vice president of something (I'm guessing Tagruato. . again, something only people who played detective would know about), but in the movie there is no mention of that at all, just "Rob is going to Japan, blah blah blah".
The first 20 minutes of the movie are so INSANELY boring, it's nothing more then a cheap party full of irritating people. They could of seriously used this part of the movie to shed some light on what company Rob was ACTUALLY working for, but it was just so boring. Then it just turned to 10 minutes of gossip about how Rob had the one night stand with the before mentioned chick.
So the monster comes out of no where, and starts rampaging across NYC. The awesome parts were seeing the army attacking the monster. . but even those parts lasted a grand total of 5 minutes or so. Also there ARE parasite like creatures that fall off the monster, but they rarely got any screen time. All I know is they made one chick explode after biting her.
But after all that, all it really was, was an irritating "I must go back and rescue that chick I screwed once, maybe I'll score again!" story. I was seriously thinking this movie wouldn't be like every other crappy movie as of late with that sort of story, but I was wrong.
But I'll give it this, the monster was seriously badass, along with the weird little crab things that were shedding off it. Too bad they weren't in a better storyline. Maybe I'm being too hard, but like Scan said, theres just too many open holes at the end (like who the hell got ahold of the video camera?). A sequel would seriously turn this to a pretty sweet movie series. Stuff like the whole deep sea drilling thing could come into play, and what happened to NYC afterwards. If not well . . meh.
If you can get someone to buy your ticket, go for it. Just be careful afterwards, my headache was rather nasty after the movie, and I felt somewhat nauseas (from the janky camera work).
*Edit* See, stuff like this is just so freakin' awesome (3 videos within the link in different languages), but none of it is mentioned, or explained in the movie:
http://www.slashfilm.com/2008/01/06/video-...ired-by-slusho/Somehow it seems more thought was put into the whole Tagruato/ocean drilling platform thing, rather then the film.