This pencil works well with my pental pencil lead.

Buy it if you casually break your pencil lead.

I don't usually break pencil leads with normal mechanical

I use a lot of pressure when I write and am always breaking pencil tips and mechanical pencil leads

but it's not as good as in the video and certainly nowhere near unbreakable.

Not as well as it's described but not that bad either

Don't overload the refill slot with too many leads as it will tend to clog the mechanism and won't uptake new sticks as needed