I just bought the S1 special edition and I want to chime in about how great this show is. It's a guy drama. They smoke all day, drink at work and sexually harass women yet it's such a heavy, touching show that even ladies could get into it.
Even the subtleties about living in 1960, not knowing what we know now make this a show worth watching.
The first few episodes may be somewhat slow but when secrets about the characters start surfacing you really begin to understand why they are the way they are.