It seems that more modern fantasy movies just can't get out of their own way. This isn't the worst movie I have watched, but it wasn't really any good either. Overall the storyline can be followed. The script is mediocre. The acting is mostly reasonable, except for the characterization of Merlin's voice. The action sequences are mostly sub par. Special effects are extremely low budget. There is surprisingly character development over the course of the movie. Unfortunately that doesn't counteract the numerous negative components of the movie. It is watchable (barely so) but I definitely would not go out of my way to watch it.
Review of Merlin and the Book of Beasts
