Kevin Costner's long gestated vanity project is here and this is only the beginning. It's quite an endeavour with multiple intermingled very personal stories and gorgeous period recreations. What I'm not entirely sure about is what it's for. None of the individual threads are exceptional: they're fine it's just like he's making 5-6 perfectly fine Westerns at once and as we all know more != better.
The real risk is that by part four, assuming that ever gets made, nobody will remember what happened in part one but the die hard fans who'll rewatch it all. What about scheduling conflicts for the quite large cast? The logistical feat being attempted here is asking for trouble. As much as this is Costner's problem it also shows a certain disregard for the audience who might actually want to see an episode have some self contained elements to make them have an individual identity but we don't get that here.
If the stories being told were exceptional then this would be worth it but this will only be exceptional if it all gets made: 6/10. The elephant in the room is that this project probably should have been a limited season TV series as in almost every other way than its release format it is one.