I picked a cheap phone on purpose, but I don't know how I'll be able to go back to a phone that doesn't have the chop to activate the flashlight gesture. It works everytime for me, and it's a pretty easy gesture. I've never had it go off accidentally either. Same goes for the double twist for the camera.
The guestures have been such a pleasant surprise for my budget tier device.
I had to use a Huawei for some time, and I never realized how much I rely on the gestures. And how much I hate bloated custom ROMs. You can say about moto as a company whatever you want, their cameras are trash, but the custom ROM is, apart from it containing gapps, perfect.
Loved it on my Moto X 2014, not sure how you're doing it wrong. double chop, small movement, around 30 degrees. Hold the phone flat against your palm, like you're shaking hands with it.
Works a little too well sometimes and it turned on when I was running with my phone in my pocket.