Watchable, entertaining, almost thrilling... Historically correct and fair plot. I would call it unconventional scenario since all the bad guys are "exposed" from the very beginning, so you wouldn't have to wonder. In addition, the "first lady" appears to be extremely unattractive - the fact that is supposed to sort out all of the "Russian Beauty" hunters. The plot is neither predictable, nor "tough". In case you've "got lost" - they politely "guide" you to follow the "correct direction" in the beginning of each series.
It could have been good, really good, an 8.5 TV series, yet they've messed up with the music. Naturally, they suppose you watch it once in a week. This assumption made them believe that you wouldn't notice, that all in all - these series have only three (3!!!) "melodies" to run... could have done better...
SEVEN AND A HALF...