Bought a Peugeot salt mill a few years ago and was very surprised to find it seemed to be very picky with the grain of the unground salt. I had to try a few different salts to find one it worked with, and even with that, wasn't really a fan of the milling feel, if that makes sense. It's adjustable yes, but I'd be OK with having to use a bit more force per turn if it would lead to a bit more yield per turn.