I've got a dozen guitars and every one has a set of these on it. These are a must have if you're moving around on stage and you care about your guitar. The piece of mind alone is worth the cost. I also find them very  convenient. It's very quick and easy to remove the strap and the strap doesn't get progressively closer to failure every time you use it (like it does without a strap-lok). Just buy 'em. You won't be sorry.