Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Did not last as long as I expected

I bought these sheets from amazon along with a set of 400 thread count from Bed Bath and Beyond for my new bed. They cost about the same amount. I have rotated each set for the last 4 months and am very surprised that the 400 count set feels like new while this 600 thread count set is pilled and rough, they will be going in the rag bag soon and I Will not buy again. Pay the extra money for the 600 thread count from bed bath and beyond.