I have purchased one and received it a couple day earlier.
I am using a 19v power supply currently to try it out.
The high is clean and mid is a little bland for my taste. When comparing with my other backup amps, an Arcam A65 and a Marantz 1060, it lacks the weight and punches. Considering the price, the size and all the functions it offers, it is hard to fault it.
All in all, it performs amazingly well for the price, ~$21 shipped.