Instruct: Classify a given Amazon review as either positive or negative.
Query: bad manual, poor design, terrible service

I purchased this device along with a GXM 30 XM radio antenna. When the antenna didn't work(it connects via USB), I thought the problem may be the USB drivers on the main unit. There were no instructions for installing the USB drivers on the disk, and no setup program. I called tech support (which had a 20+ minute wait) and the only help I got was the tech stating that it had worked fine for him and that he didn't think that the lack of instructions, or the lack of a driver installation program, was problematic. I returned the device and I'm still waiting for my refund.