I didn't care much for it at first, but later, really enjoyed how the storylines mirror a little of what was going on historically and frankly, what REALLY hooked me was the cast of characters. I love all the subtle intrigue both among the servants and the family, the tiny details in what is said and what isn't said.
And, please, Maggie Smith doing what she does best--steal scenes left and right. I love her.
I am COMPLETELY Team Edith. I know what it's like to be the "ugly sister" so I completely sympathize with her.