I really loved it, its one of my favorite books that I have re-read about 4 times. I too felt it was a bit rushed and should have been a one hour for each period I think. The characters/actors were soooo well cast - just as I had imagined each one.
I watched it yesterday and I was almost crying by the end of it!! The casting was perfect. Why didn't they do it as a three parter though? Some series they drag on but this one wouldve worked out beautifully. What Sarah Waters books haven't been dramatised now? I'm trying to think.
I thought it was very rushed. I agree, a two-parter or even three hour/50-minute episodes would have been better. It was quite good but not overwhelmingly so. I liked JJ Feild particularly, and I thought the period clothes and make-up were excellent. <shallow>