Been catching this on iplayer, as I love Mad Men. Unfortunately, I think it falls short of Mad Men - where I really think they've got the drama and acting and time period correct- whereas, on this, for example, the London spy, doesn't have a London accent at all! Could they have not gotten a British actor? (Unlesss, he's not actually supposed to be British?)
Still, there's enough in there to keep it interesting enough. And from all accounts they've got the Pan Am stuff spot on!