It was pretty okay. Hayley Atwell and the actor who plays Jarvis (running late, can't go looking up names right now) have good chemistry, and I personally was impressed by the number of voices Ms. Atwell has at her disposal for playing other roles. She also has a pretty good control over mannerisms; when she pretends to be the health inspector, her body language is entirely different from when she's playing Agent Carter. The amount of superscience on display is a little annoying, though (crap is being invented in the 1940s that even Iron Man wouldn't stand a chance against), but my biggest disappointment is with the ham-fisted attempts at feminism.
Understand that I say this as a feminist and as someone who is routinely accused of being an SJW, someone whom you'd think would appreciate this kind of thing: I think the show handled it very badly. The problematic radio program is tolerable at illustrating the problem, though about as subtle as a grand piano being dropped on a hungry coyote; where it really loses me is Agent Carter's choice near the end of the episode to get respect by physically attacking someone. Yeah, yeah, I know it's kind of established that's how she handles it (it's what she did in Captain America: the First Avenger, after all), but it strikes me as a revenge fantasy being confused for feminism. It also strikes me as someone misunderstanding the term "strong, female character," thinking that for a character to be strong, she actually has to beat people up.
That's just me and one of my hangups, though. All in all, it's fine, and even if the show nosedives, I'll still probably watch it to the end just to see what other tricks Ms. Atwell pulls out of her acting bag.