Sometimes, weed get's between the sides of the grinder and it starts to stick. Just use a flat-head screw driver and scrape it off and it will be a-okay again. Grinds like a beast, had to buy screens for it because if you grind too much it starts going through the bowl.

I have owned this for quite some time.

It is very small but still gets the job done. It will grind matter up very fine if you use it for more than a few turns.

The only improvement would be a screen, but thats it.