On the headphone website, the links to the USB DAC stick disappeared. I ordered the package deal in February. The Arrow HE arrived in March, but no feedback regarding delivery of the stick, offer for refund or replacement (e.g. by DAC cable). Fortunately I kept my Lyrix USB, but the stick would have been too cute. A while ago the links to the trade-in disappeared, but then came back again. When I ordered the Lyrix USB, promised specs included charging by USB which then turned out to be not feasible.
Another open question is the Arrow's second line-in, marked "chg". I was told long time ago that the Arrow could be charged by the second line-in, but adapters or at least instructions are still missing.