Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor, pilly quality.

This sheet set does not fit our mattress very well, and needs to be re-fitted over the corners daily. The fabric pilled after one wash and is very scratchy & uncomfortable. Even though this is our newest set of sheets, it is our least favorite and will soon be given away to those less fortunate. Not the best anniversary gift I've ever given.