"Frankenstein" reminded me of the "Underworld" series by the same producers, which also described a war between fantasy creatures, but lacked the sex appeal. I missed especially Kate Beckinsale who´s tight leather outfit was the greatest attraction of "Underworld".
"Frankenstein`s" cinematography wasn`t bad, even that the film looked like a low budget production. The rare 3D effects were a bit too frugal for my taste. According to Wikipedia the film was shot in Australia, even the outdoor impressions of a allegedly medieval cathedral, maybe to save a lot of money (wikipedia). But my wife and I had fun anyway, because we had expected just a simple entertainment - and that was what we got.
I enjoyed watching Bill Nighy, who also had important parts in the "Underworld" series. Again he displayed a mixture of coolness and goofiness. Aaron Eckhart, as Frankenstein´s creature, didn`t deliver an Oscar worth performance, but did a solid job as a suffering outsider.
"I, Frankenstein" is a passable entertainment for those who like the genre and don`t have too high expectations.