It was previewed at a film festival in Toronto in September and received very mixed reviews, with a Rotten Tomatoes score of 36% based on 14 reviews. I read several of them and most talk about how gimmicky the overdone camera tricks are, along with complaints about the story and lack of any interest in the characters.
The actor who plays Edison, Benedict Cumberbatch, looks nothing like Edison. From what I've read he plays Edison as a devoted husband and father, which goes against just about everything written about him.
I get very annoyed by anachronisms and incorrect details in period-piece movies. I think this one is destined to bug the cr*p out of me. The poster alone rankles, showing a blatantly obvious reproduction bulb and socket:

A scene depicting Edison showing off his electric lights to financiers at Menlo Park has the lamps laid out in concentric circles in a field, not on posts around his lab as it really happened. From the very brief clip in the trailer and in some photos online it appears that the bulbs are all frosted, rounded, far too bright, and lacking evacuation tips:

(There are some much larger photos online that show the modern bulbs more clearly than this one.)
It was due to be released the day after Thanksgiving but that was put on hold because the film was produced by The Weinstein Company and that has become a toxic connection. I suppose whenever it is released I'll have to see it, however reluctantly.