Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Waste of money...

This product is a waste of money. The package says to allow EIGHT weeks for it to work!! The whole thing doesn't last that long. It lasted me about six weeks. You see some results but it feels like you're being inflated and then if you don't take it even for a few days you deflate. Don't waste you money with this stuff, just invest in some good creatine and protein and your pump will last longer and you'll gain more mass.