Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Made my back feel worse!

I have a friend who swears by this product, so I bought one. I have chronic back pain, and am always interested in something that will help. However, this actually made my back hurt more! I ended up giving it away. It is very hard...no give to it at all. I have another, bigger, lumbar support made out of a memory foam that works much better for me.