I'm a career-changer and this was genuinely useful, but not perfect. The chapter on daily duties was spot-on - it described the calipers, the gauges, the standing for hours, even the smell of the factory floor. I appreciated the honest salary ranges because they're lower than I hoped but realistic. I rated it 3 stars because the first chapter dragged a bit with too many examples and the tone was a little dry in places. Still, I feel way more prepared to make a decision now than I did after any job posting. Worth a read if you're serious, just skip around.