The show is a semi-documentary, semi-drama. Photographed and written masterfully. Truly engaging. Watch it if you are interested in historical drama in general. I also recommend it if you are not interested in history, but happen to know little about the end of the Russian monarchy, because it is just a good story. So you can enjoy it just for the sake of the plot as well.
It's fine for someone who is being introduced to this part of history, but it doesn't get across how mindbendingly idiotic Nicholas & Alexandra were, or how charismatic/unnerving Rasputin was. Also Nicholas & Rasputin's beards look nothing like what's in the history books - latter especially looks like a cheap prop.