My part of this was mostly to stand still and let Hubby do his thing.
It was tricky to get it right. The length of the hair made it difficult to get it horizontal because it kind of "sways" down there, not like a solid, unmoving shelf.
The trick was to close it first, then pull it downwards until it was at the right length, then tug it slightly on the sides until it was right. Trying to close it around the intended length made you have to adjust too much and then you miss the spot.
Hubby concluded that he wasn't entirely sure this thing was actually a help for him.
He felt it was a bit in the way of the scissor. If he cut right up under the clip, the scissor collided with the clip a bit. But if you cut a bit underneath the clip, what is really the point then?
Maybe it feels different if you use it for your bangs, like it was actually intended for?