With such a short running time, there's no time for character development or background - you're instantly thrown into a very private scene of a failing marriage. You're instantly thrown into their slightly surreal, privileged and fake world. You want to know why are they like this. This is explained in this first scene where Joan Blondell is provocatively putting on her stockings in front of her husband who is unable to insert his cufflinks - this and the diced carrots analogy tells you everything you need to know about this marriage.
Apart from Frank McHugh's comedy relief character, none of the other characters are that likeable - they're not black and white but a lot more multi dimensional than is typical from films of this era. Even Joan Blondell is horrible whilst at the same time being utterly desirable and makes her character completely believable as someone who can manipulate these weak men, well to be honest, all men.
In typical 1930s penny-pinching WB style, this was all put together in just three weeks with people working 14 hour days. Joan was having her own serious marriage problems at the time and was so over-worked that she collapsed from mental exhaustion shortly after this was finished. Despite this and the perceived light-hearted approach to violence towards women - which is a little uncomfortable to watch (but when viewed in the context of these damaged characters makes sense), Smarty is still fun to watch and Joan somehow manages to look amazing and be convincing.
Considering it's a rush-job, it's reasonably well directed although a bit stagey at times and well acted even by WE and EEH who are out of their usual comfort zones. Overall - an enjoyable fun picture that's also a lot deeper and more thought provoking than you'd expect.