This movie starts a bit slow and you have no clue what direction it takes. Once you get into it, it will keep you watching. The writer clearly has been influenced by some other movies within the mystery and horror genre, The Man from Earth has been mentioned, I'd like to add 'He Never Died' as well.
The well thought through story is what makes this movie stand out above the, mostly cliché vampire horror flicks of the last decade or so. You do need to stay focused to make sense of the whole story: the origins, history and grand picture. Together with the actors giving it the right feel, it gets a 6,5 rating, despite the sound track being somewhat poor and badly channeled (I had to use the 'normalize' feature of my sound system). Blood and gore/hack and slash isn't overdone, and that works quite well here (just wait for the surprise).
Cast is certainly interesting, and well fitted for this movie. Grandpa August was excellent. There was some very decent SFX. The flashback editing part could have been a tad smoother. For a low-budget production, this is was well balanced.
I can certainly recommend this, but watch it with subtitles if you can.