Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: At least I got one defective

I recently bought this unit on Amazon on August 2007. My unit was completely defective. When I turned on the wireless switch on my router, it did not respond even if i make a ping and the WLAN and WAN leds do not turn on. I have no connectivity to it at all. This problem appeared since i began using it. There is a forum about this problem. For more details look at: http://www.dslreports.com/forum/r18551201-Zyxel-X550-Radio-Switch-Disables-UnitHope this information get you aware of this product before buying it. In my case, i went through a refund.