Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Didn't work, had to return it

This is a simple product: it either allows you to use older peripherals with modern USB-equipped PC's or it doesn't. In my case, it didn't. I tried it with a single "Dell" (actually IBM) keyboard and three different PCs: a Gateway desktop, a Lenovo ThinkPad, and a Fujitsu P-7000 series notebook. It didn't work on any of them, even after rebooting. Oh well. (Amazon refunded my money).