I just skipped most of the above posts for fear of spoilers (I don't like know much/anything about monster movies before I see them), so if my question has been answered, I apologize.
From the previews I have seen, I haven't seen the monster(s) at all. Does the movie show the monster(s), and if so, do they show it/them a lot? Also, if they do show the monster(s), does it take a while/long time before they show it/them? I don't want to spend ~$25 (2 tix + refreshments) to see a movie that doesn't show a lot of the monsters. Please, not another Blair Witch Project.