Summary: In my opinion, this is as good as the unit of several times more expensive ones.
This is no way inferior to Matrix mini, other than smaller number interfaces to the audio source.
It is also driven by IPAD through USB powered hub.
The design is considerate, compact, and beautiful yet srong.
Summary: Great entry level DAC. Noticeable improvement over the onboard sound of my mac. Pairs great with my audioengine A2s. Powers my HD600 and HE400 headphones very well, seriously can not tell the difference between this and the Asgard 2 (which very much disappointed me for the price).
Gorgeous looks and build quality. Great size. If I ever upgrade my DAC I will use this as a portable/bedside DAC + amp. Powered off USB is great.
Pros: Great value, sounds great, drives all my headphones well