Just saw the movie. I enjoyed it! Yes the dialog could be better, it was flat at times, and there were a couple of moments that were unintentionally funny, but overall I had a good time throughout. I like the darker elements.
I think if you go into it expecting a masterpiece you'll be disappointed. But otherwise, I don't see why people wouldn't be entertained, especially on the big screen. I'm rooting for it to do well!