I found this TV min-series to be absolutely superb. The acting by the international cast was excellent and the costumes seemed like they belonged to the time period. It is a great, sweeping story about one of the greatest monarchs of all time and this film does not disappoint. The filming in Russia I think made the movie all that much more convincing.
It may be subject to the criticism that it is not completely historically accurate, but then the point of the mini-series is to entertain with a delightful story and I think it is understood that some freedom to re-write the history is acceptable. The main outline is correct and the characters look and act the part well.
I do not make this rating lightly. I have it on a VHS tape I bought years ago and still watch it often. I highly recommend it. Find it on the Internet and buy it. That's my recommendation.