Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unreliable and unpredicable performance

When I first purchased this device (also from a retailer other than Amazon)I appreciated being able to use a mouse, an external hard drive, a keyboard and a set of head phones through my Belkin. Now, I have the exact problem described by reviewers even though my device is only about 6 months old. Sometimes it works, sometimes it doesn't. Lately its been working less and less. There are 4 ports and each lights up green if it works. I started at 4 working when I purchased it, than went to three and now one works, on occasion. Sometimes you reboot and that helps. Sometimes it doesn't. Very unpredictable performer.