When I heard there was going to be an Agent Carter TV series , I thought that was great because I loved the Marvel One-Shot they did, I think it's the best one. I think the majority of what's riding on this shows success is the lead; fortunately Hayley Atwell pulls it off perfectly as the titular character. You're with Peggy every step of the way and you know she's a strong, independent character who holds her own. Atwell does brilliantly in this role and am always glad to see her in the films and TV series. Dominic Cooper also returns as Howard Stark who is OK, but can never have the charm and charisma of Robert Downey Jr , so he serves his purpose the show but it doesn't bother me that he's not in every episode. Next I'm going to come to James D'Arcy who plays the brilliant butler Edwin Jarvis; we all love Iron Man's A.I. computer and now I think D'Arcy has done extremely well in portraying it's namesake; Jarvis is one of the best characters in the show, he has some great lines, he is used well in the plot and he really does have great chemistry with Carter which is fun to watch. There are some other characters too who filled various roles for Carter to interact with, mostly the other SSR agents who were all well and good; so all-in-all the cast wasn't bad but Atwell and D'Arcy definitely owned the stage.
Next I come to plots and story arc. Unlike Agents of S.H.I.E.L.D. which in the beginning, the majority of plots relied on something which had already been set up in the films and had few original ideas, and also Agent Carter had only 8 episodes thankfully, which negated the need for pointless filler episodes which moved the overall arc more smoothly. So because it all happens before any of the films (except one obvs.) they had to get some good writing; in the end I was intrigued with the mystery and the individual episodes themselves were entertaining enough. The only problem I would say it has was the fact that there wasn't really a specific enemy, no one target; some could argue that there was but he only appeared mid-way into the series and wasn't that impacting. So on the antagonist front, a little weak.
As a conclusion I will say Agent Carter started off much better than Agents of S.H.I.E.L.D. it really worked well in the Marvel universe and set up some exciting stuff along with showing us some great characters, old and new.