I've never been a fan of the cheap plastic collar stays that come with new dress shirts and have been using metal stays for the past few years. I bought these because I liked the idea of the magnets. They didn't disappoint. As some of the other reviewers have noted, the magnets are a bit tricky to apply because they're so strong. But once you've got the hang of it, there is nothing--not even gale-force winds--that's going to make your collar move. Definitely a good investment--and the magnets work well with my other metal stays, as well. The only downside is that the Power Stays only come in one size. Would love to see them make stays that are both shorter and longer for various collar lengths.