Mine was fine apart from the knob giving the amp considerable channel imbalance, which is unfortunate even at its price tag. Thankfully mine was still under warranty. I described the issue to customer support and they just sent me the full refund back, which was cool.

Edit: too bad you basically become a stranger to the customer support once your warranty comes to its end. If I,m buying something as stationary and single-purpose as a desktop amplifier, it would be nice to at least be able to have it repaired.