Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Much firmer that one I bought a few years ago

I was very excited to be getting a 2nd McKenzie neck roll so that I could have one to take on trips and as a back up. Well I was very diappointed because this McKenzie roll was so much more firm that the one I bought a few years ago. It is so firm that I can not use it so it sits in a closet unused. I wonder why the change in firmness of the foam? Unfortunately this was a waste of money for me.