This could have been a good flick but the story was too muddled. At the end of it, I find myself asking, what was the point of it?!
The CG / effects are hair better than a typical SciFi channel movie; with a bigger budget, the film's visuals could have been outstanding. As it is, sometimes they're interesting and other times they're almost distractingly bad.
As far as the acting, Stephen McHattie certainly stands out in a good way, but the rest of the cast are pretty standard and not all that interesting. Unfortunately, McHattie can't make up for the film's drawbacks, and ultimately what drags the film down is any lack of coherence or depth to the plot. The teaser "Hellmouth is about a gravekeeper who is drawn into a hell dimension to save the soul of a beautiful woman" sums the film up completely, and sadly, there's not really any depth to the story beyond this statement. This is one of those films that felt like it could have had real vision, but failed due to a lack of focus by the film maker.