Now, today, I've got a refund request, with the message:
Hi James When I first got the unit I tested it using my guitar to the unit's input and connecting headphones to the unit's output and everything was working fine while I tested it for like a minute or so. I finally got time this weekend to connect and test all my setup and unfortunately it seems there is a problem with the G force. There seems to be some sort of white noise and volume fluctuation that randomly comes and goes when you are using the unit.
So, what do I do? I had listed as no returns unless it arrived damaged or different from description.