I really enjoyed this series, but it ended very abruptly. The exposition led viewers to believe that Sophia, the main character, was the driving force behind Russia's expansion, but I didn't really see that in the series. I was wanting more. Perhaps it's because I don't know a great deal of Russian history.
The costumes are wonderful, and the acting is pretty good too. I enjoyed this glimpse into another culture. If you don't speak Russian, and you're willing to read the subtitles, this is well worth watching.