I tried the Performance 2 model. Did NOT work on my Martin D-28. Maybe works well on another guitar but not for me. I was really bummed because I had some great recommendations.

Not sure why the other reviewer said it would not work on his D-28 unless he possibly has a vintage v-shaped neck. I use mine on a Taylor 210e and it works perfectly. Easy to put on and take off, even if you don't have a lot of grip strength. I've used the Kyser and Dunlop capos and this is far easier for me, and it feels solid and high-quality. Which I guess it should, for an expensive capo, but when you're using it a lot it definitely seems more worth it. Just drop it on and pinch it closed. Flick the lever to release. The only thing holding this back from being perfect is the high cost of admission. But if you're willing and able to dish out the cash, I'd say it's a no-brainer. Nicest capo I've ever used. Go get you one.