Wi-Fi bridge claims a range of 5 miles

I’d love to get my paws on this one: A wireless outdoor network bridge that can connect 802.11g devices over a range of up to five miles. Or so claims its manufacturer, HD Communications.
For $318, the HD26200 includes two high-performance Ubiquiti network radios with integrated 17dBi dual-polarity antennas that are configured in wireless bridge mode. You don’t even need power cables, since both the units are powered over Ethernet.
There’s just one gotcha: the 802.11g devices need line of sight of each other in order to work. HD Communications says it plans to launch a version that doesn’t require line of sight by summer’s end.
In a press release, the company claims that the HD26200 “works every time and outperforms other manufacturers' $10,000 wireless bridge solutions.” Is there a money-back guarantee?