Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Get the original

This is an aftermarket filter. It is slightly smaller and much less substantial (less filter material) than the factory filter. I'm also dubious about the quality of the antimicrobial agent, since it started to smell and picked up a yellow growth after just a few weeks. I bought this here because of the convenience and free shipping with my prime account, but will be ordering direct from Lasko next fall when I need the humidifier again.