I think this is one of Dreamwork's best films, though not as good as Shrek, and I recommend this one. There are some annoying and underdeveloped characters but the main characters are endearing with the least liked being Insectosaurus. I don't understand how she came back to life and turned into a butterfly. It tells a story using characters from B-movies in a pretty original way and Ginormica is nearly one of the best animated characters.
It's also funny and dramatic. But at least the humor is not too overdone. I wish it was longer, there could've been more drama. It has a great message about being different, though the monsters scaring people thing is preachy.