Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Complete waste of $$$$

I could probably have filled my tire better if I personally tried to blow it up with my mouth. The first one I recieved didn't work. Amazon exchanged it for another, that one worked once. I recently tried to use it again, and it didn't work at all. Don't waste the $20-not worth it. I would give it 0 stars if that option was available.