Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Customer Service gets back to you fast, but often

I've had to trade mine in 3 times. They have a poor quality product here. It's small, and when it works it's nice, however it doesn't work nearly enough. Software errors can make the device inoperable, and I've had three so far. It will simply blink with no other functions available.Customer service got back to me quickly with each return, however I was out shipping and handling for each return as well as went 4-5 weeks each time between getting a new one.The UBS cable is smaller than most UBS devices, so if you have only one or two UBS ports open you might want to think about how often you'll have to unplug things rather than sharing a UBS cord with another device.For $..., maybe, but for $..., it's not a good deal at all. I recommend a CD-MP3 player for durability.