Instruct: Classify Amazon reviews into positive or negative sentiment
Query: King size pillow cases works great.

I purchased an arms reach co-sleeper and nearly choked when I saw the price of the sheets. My mom told me to try a king size pillow case and it fit like a glove. So instead of paying 20 bucks with shipping, I spent 10 dollars for a pack of two king size pillow cases at a local store. They fit perfect and now I can get more for the buck.