Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a good accessory for this excellent mixer

I am on my second grinder - no more! It grinds OK, but when you're finished, there is always some meat caught between the blade and the disc. The blade doesn't seem to hold its' sharpness. But the most frustrating problem is that both the feed shaft and the housing are made of molded plastic on metal. After relatively little use, the plastic begins to crack and break away from the metal. Since this is used for grinding meat, the cracks make it extreamly hard to clean. I recommend against this accessory and suggest finding a seperate all metal meat grinder (which I am in the process of doing).