I decided to take a look at Season 1 and was hooked. I thought the whole Series was well done and did a fine job of portraying the British and the Royals. Regarding Season 4, if someone wanted to pick at it I am sure they could find some reason's but overall it remained loyal to the Series. I would only alert some
to be careful if you sign on to Series 1 you may be or will be hooked for the rest.