Horrible speed and data usage ever since Upgraded to Gigablast

I took a look from this end and all seems well with the connection from this end although I see what look like may be a retail wireless router connected to the gateway. Because the gateway we provide has the wireless router built-in adding your own will case problems similar to what you're describing. I'd suggest removing the extra router then using the Panoramic Wifi app to monitor data usage by device to see which ones are consuming the most data.

-Chris