Been enjoying my D7 quite a bit on my Hackintosh. I went from an ALC889a to this for a small, but noticeable improvement on my Klipsch ProMedia's. I have zero issues with it. I love that I don't need a driver for it. This is the perfect little device for someone wading into audiophile waters. I can add an amp later if I wish, or just use the DAC + amp combo.
I've yet to try headphones. One of these days, I'll give it a shot.