These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The story itself is actually refreshing - there aren't many movies where the modern world has been brought to its knees by dragons, and an American Dragon-slaying Unit is an interesting twist - England is usually the setting for those kinds of stories.
So Bad, It's Good: Director Rob Bowman said that he and everyone else involved on the project were fully aware that they were essentially making a B-Movie but decided to do do the best job they could meaning that the film includes genuine acting and some truly amazing visual effects.
Special Effect Failure: As Van Zan clims the ladder at the end, the metal bow of his crossbow is bending on each rung behind him, revealing the fact that it is made of rubber.
Visual Effects of Awesome - The dragons were created by the now-defunct The Secret Lab and did look pretty convincing, to the point that quite a few reviews would say the movie was bad, but the dragons were awesome."