It's clever for being "dual" but really, it's a terrible grinder.
If you just want a super-light dusting, maybe, but it produces so little grind per twist that you will be there a while getting your work in.
The part of the grinder you need to grasp is pretty small, so it takes some finger dexterity -- not bad, but considering how long you will be spinning this thing, it's a chore.
Last, it seems to throw in some larger chaff and chunks with the grind, not a consistant size.
