Works well, looks good, is gentle to your guitar, what more do you want.
The obvious downside of this thing is that you can't easily clip it onto your headstock like a trigger capo. Since I only play at home, I just have it laying on my desk when I'm not using it. Fits my acoustic and electric, doesn't fit the classical, as you'd expect. I also doubt this would work with a seven- or more string guitar. But for my uses, I'm absolutely happy and it feels a good bit more premium than a cheapo plastic clothespin on your guitar. It's very small so it never restricted my movement. Hardly even noticed it's there.