Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great...while it lasted

Had this for just a month, when it would no longer grind. The motor just doesn't seem powerful enough. The output is on the small side, since when the motor DOES work, it goes very slowly. For something that uses 6 (!!!) batteries, there should be more than enough power. I will not replace, and I would not recommend. Avoid.