Well, to start off, they work and that's what's important.

They're more durable than other Shirt Stays that I've bought on Amazon and that's large in part because of the clips. They hold my dress shirt as well as an under shirt well. But the clips can be the downfall as well, primarily when you're going to the bathroom. Removing of the pants tends to catch the clips and unfasten them. Not a huge deal, just be careful removing pants unless you don't mind fastening them again, which isn't fun but it's bad. Just a pain to repeatedly do it.

They're noticeable that you're wearing them. Not so much when you're standing up but primarily when you're sitting down. They stretch out so they can pull but you can move. So when you're sitting and they're attached at your waist and your socks it pulls at the pants at the back of the knees. It's not a big deal though, no discomfort, just something you'll feel.