Some reviewers obviously disliked this show. Yes, there is a lot of historical sloppiness such as flashlights before the dry cell and incandescent electric bulb were invented (Google "history of flashlight"), or the use of dry ice at the opera (dry ice was invented, but not in widespread use as their was no commercial manufacturing or distribution yet), how Jonathan Rhys Myers (Dracula) can mimic an American accent (presumably without having been there) are all flaws, however these nuances shouldn't ruin the total viewing experience, and I don't think they did.
This show is a completely new approach to the Dracula story--it would seem the only thing in common with previous versions is that Dracula is a powerful vampire who shuns daylight. Other than that, pretty much everything about the story seems to be original. There are familiar characters like Renfield and Van Helsing, however in this story they are completely different than in past depictions, with totally different motives and purpose in Dracula's life.
I'll give it a couple of more episodes to see if it thumbs up or down, but it wasn't too bad for a series premiere, just a little sloppy.
UPDATE: Episode 2 Well despite the rant trying to say my facts are wrong and the writer's are correct (just Google to see for yourself), Episode 2 came forward with the same sloppiness. The storyline carried on, but the story is already getting tired. Same old Dracula where for some reason, he kills in the middle of the street, makes a bloody mess, then looks up and growls before continuing his meal. Grrrr?
An actress uses a quotation written in 2008, "The Devil you know...." Time travel? The fencing scene has the actors wearing modern, lightweight fencing masks and modern form-fitting suits... These consistent flaws aside, its been revealed (by obviously a writer of the show) that Dracula's American accent will be explained, as prequel episodes are forthcoming.