Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Doesn't do the job

The advantage I thought with this was that it did not require any special bags. While this is true, and it is an advantage, you still have to change out the bag daily, because it doesn't do the job of keeping odors at bay. You won't save a lot of money: you'll spend probably as much on regular trash bags as you would on proprietary bags (as with a Diaper Genie).