Also, the method of holding the bar in place, is important.
If you use the arms "crossed in front of you" position to hold it up, there is much less force holding the bar in place, (toward your neck). The bar is just sitting on your delts and if you tip forward, or break form, the bar rolls off your shoulders.
IMO, the best grip is to hold the bar as if you just did a power clean and got it to the catch portion of the movement. You'll have an overhand grip, basically. In this way if the bar moves, you can push it back in place. Also helps in the bottom when you can push it back and up to help begin your upward movement.
This is why Oly lifters do them: They simulate the bottom portion of a clean, but with heavier weight. Same Grip as a clean. BUT it requires some practice to get the wrists and forearms flexible enough to be comfy. It's a way more powerful manner to hold the bar.