I found other threads mentioning superpass antennas even some usb type but think I am first thread to order their largest gain usb unit (A20). price was great 109, even with shipping and optional active usb extender was only $142. It was not clear if the unit comes with usb cable and also looks like you have to download the driver from site.
From other threads I agree it seems like a 1 man shop -I called..
chinese accent {I think) and he has no online shopping cart, you send email and he returns total with shipping - he now accepts paypal as opposed to previous threads said only checks but he has no online ordering (email only). the unit
I have been comparing usb / poe / repeaters / amplifiers and this was the best trade off I could find. Item shipped yesterday and I hope to receive unit and post more details from the "deployment" this weekend.