Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not a good product

I had this unit for just over a month and only used a couple times with no problems. Then recently tried to inflate a bike tire, which it is capable of doing, and when connected to valve stem it stops. Runs when disconnected from stem so something shutting it done when trying to put air in a tire. No good and very frustrating for a new product that recieved such good review. Two thumbs down.