This was a fairly decent western, not terribly accurate in terms of history, but also not as bad as, say, "The Sands Of Iwo Jima." Overall, not great but not horrible either.
I see a lot of naysayers in the other reviews, and I must disagree. Rickards did solid job portraying the protagonist and, if you've seen her elsewhere, "Arrow," for example. Not surprisingly, the two best actors from that series, Rickards and Amell, play the two pivotal characters here; Jane and Wild Bill.
A couple of things one should always keep in mind when watching a drama based in history; never expect strict adherence to historical facts, as artistic license and interpretation will always skew the true events for the sake of pacing; they can't typically jam all the correct history into a two or even three hour production. Even miniseries suffer from this and they go even longer at 8-10 one-hour episodes. McCall was actually tried twice in real life. "Because Deadwood was not under a legally constituted law enforcement or court system, officials argued that McCall could be tried for murder again. Agreeing, the federal court in Yankton, Dakota Territory, declared that double jeopardy did not apply, and set a date for a retrial," which was not covered at all in the film, not even by a subtitle epilogue. No spoilers, but the character Jack McCall was based on the real McCall who was, in fact, Hickok's murderer.
Again, not horrible and it's available through Prime Video as of 2024\12\02. If you liked Emily Betts Rickard in "Arrow," it's worth a watch, but it's a VERY different kind of performance for her. Surprising to be sure, but solid, nonetheless.