The costumes, the sets -- all perfect. Peyton Reed's direction for the most part maintains that light touch needed for the story, but the script churns to a halt when switching gears. Like a lot of nostalgia production these days, it tries to have it both ways: reveling in the old times and the hilarity of women's lives sucking (-_-) but also 'updating' for a modern audience. And it's the latter part that doesn't quite work. In the end the script is not clever enough to overcome that challenge. It's a difficult thing to do, but I can't help wishing they'd worked harder to do so.
But it has ample charms and it would make a great double feature with Pillow Talk, so give it a whirl. And then drop by Todd's to see other recommendations.