I've seen the first episode, lots of action schlock and tv drama but the historical bones seem solid. However I did notice that it's set in 1915, and an arms dealer has an MP40...
Not bad, not great, very Korean (insofar that it's very graphic and has silly over the top action) the dialogue is oddly paced and it has a very excessive gun-fu anti-hero but eh, I'll watch another episode or two before I make my final verdict. Don't expect a serious historical drama, but it was fun enough.
That MP40 though bothered me a bit ....