I'm not a fan of ratchet crimpers for barrel connectors as I find them more time consuming and more than a bit clumsy in close quarters (try using one under a congested dash...). If the wire slips in mid-ratchet, you may be starting over. These came into being for basically one reason; repeatability. As more and more specialty crimps came on the market, the crimp manufacturers were having issues with failed crimps because of operator error. With the ratchet crimper, it won't release until you've 'fully' crimped the connector, which helped eliminate that aspect. With an 'approved' ratchet crimper, they would warranty the connection. But again, keep in mind that these warranties are only good for their rated use, which generally doesn't include automotive applications. I've also seen where if you're trying to 'Disney-rodent' something (yeah, you shouldn't, but there can be times..), they don't work as well as the old-style manual crimpers like the ones I gave part numbers for.