Got mine today. Plugged it into my machine which is currently running 2 Ant U2's with CGminer 4.4.2. I used Zadig to install the WinUSB driver for the device.
Do I need to update CGMiner or change my command line to get this to work?

UPDATE: Tried CGMiner 4.7.1 and no improvement.

Icarus detect (1:11) fialed to initialise (incorrect device?)

Is no one using else using their U3 yet?