I fully agree with the previous review by Marcin. Although the series has some qualities and is " watchable " for a viewer with an average knowledge of the KuK era and the Habsburg history, for an "advanced" viewer with background knowledge there are additional inconsistencies with the reality, some of which could easily be avoided, like ommitance of mustache/beard of the emperor: Through the whole series until its end by the coronation in Budapest (1867) the emperor Franz Joseph has no mustache/beard although his portraits and coins clearly show that he had grown the mustache already by 1855 and beard by early 1860.
More annoyingly than a detail - I do not understand why the series ends in 1867/8 ? Sisi lived for 30 more years (assasinated in 1898) and many more important milestones of her life and marriage happened after 1868: Mayerling tragedy - suicide of Rudolph, her stay in Corfu, her travelling around the world etc. Was budget the reason ? To show her complete picture the series should have at least 4 - 5 parts.