I like the Razor system, the hand mount and the helmet mount. Easy to move the light from the hand to the head and back. I still have a boltsnap on the light’s head to clip it off a d-ring if needed. I really like the ability to go back and forth between hand and helmet, though, and mostly just use the snap when the light is off.
That said, I dive without gloves. I can see the mount being uncomfortable if you need thick gloves, in which case a hard handle that you can remove entirely is probably better for dexterity.