Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Slow and very difficult to prevent air inclusions

The combination of the long, narrow feed tube on the grinder and the plunger that is just slightly smaller than the feed tube, it was possible to push the meat into the grinder so it would feed into the casings. The difficult part was refilling the tube with the ground sausage without including pockets of air. I'd be very interested in how other folks got this item to work with any kind of efficiency... my 5# of sausage probably took us between 60 and 90 minutes to stuff. This was long enough to make it difficult to keep the meat cold during the process. We managed, but I'll be looking for another stuffing alternative. On a side note, I can't exactly ding KitchenAid for the design of the grinder (long, narrow tube) since it is how they prevent fingers from getting caught in the impeller (a safety feature I consider worth the inconvenience).