Don't Listen to people comparing it to del Toro's Hellboy
This movie was awesome.
I wasn't sure about seeing it because most of the reviews were bad. Then I read those reviews and realized that they were mostly comparing the film to del Toro and Pearlman's Hellboy, which, if you are a fan or even a casual reader of the comics, is a bit watered down, but still pretty good.
This film was very much a METAL movie. Like hard metal. There is a lot of violence and a bit of gore, but I'm usually gore squeamish (won't watch any SAW movies, but I do enjoy horror) and it didn't bother me any because it doesn't linger on it.
This movie is also very much a movie for fans of Hellboy from the comics.
The film mostly suffers from some pacing issues. Things happen a bit quickly, not leaving much time for development and felt a bit like they had enough content they could do a mini series if they wanted. (Which I would love.) However, the sped up pacing did not detract from the film.
Most people are going to complain because there is a LOT of violence and gore in the film and it certainly isn't a movie for kids. It is very much a movie for adults, those who like metal, and those who are fans of Hellboy.