I originally read this book many years ago (nearly thirty, I think), and I enjoyed the re-read. It's a satisfying story, not hugely original, but well written and well paced. It does reflect the technology of 1950's America, and more so the attitudes. There are parts that are repulsively sexist by modern standards. But such attitudes were common in the age in which this novella was written. All in all, I find this to be one of the more enjoyable of Heinlein's early works.