Instruct: Classify Amazon reviews into positive or negative sentiment
Query: My first grinder

I've had this burr grinder for over two years now. I was very happy with it for a while, but it soon didn't grind evenly no matter what setting you used. And I soon found out I had to use twice as much coffee bean to make the perfect pot. I had difficulty removing the burr so my husband took the thing apart for me, and we found about a pound of coarsley unevenly ground coffee stuck in the back of the machine! What a waste! We have had unscrew and empty that wasted coffee twice so far. I am looking for a new grinder.