My first unit had the noise issue and I just got the replacement. On a quick bench test I encountered something that also happened on the first unit and it seems like it must be a bug. I selected the device info screen so that I could record the serial number. The device seems to have a timeout and the screen changed to the logo. Then it stayed on the logo and did not respond to the buttons. I had to restart it. It's a fairly minor bug but maybe someone at Aqua Computer might look into it. I didn't pay much attention to the firmware version but I think it was 1007.