I have a Porlex brand Japanese hand burr grinder that I bent the shaft on with a cordless drill, so be careful with that method. I then got a Capresso that's been pretty reliable. I got one of the OXO grinders with a built in scale that I LOVED, both for grind quality and the fact that it had the built in scale, then it started acting up with a currently undiagnosed issue where it seems to clog or otherwise not pass the beans through the mill, setting off the empty hopper stop. So it's back to the Capresso for now, which is smaller, quieter, and apparently more reliable than the OXO.
Odd, I've never had one hiccup with mine. I think I remember seeing something in reviews about certain roast types (oily over-roasted?) sticking in the chute. If anything, I under-roast my beans.