The LD HPA6 is not unlike the comparable ART or Samson or Behringer units (probably sourced from or manufactured by the same Chinese companies & plants) or the now discontinued excellent Alesis unit, but it has a somewhat better set of features, like the separate L/R earphone mute switches or the mono switch and actually informative level meters instead of poor sounding eq or weird "contour" controls etc.
The AUX input, for easy "more me" ego&performance enhancing headphone mixes is super useful, as is the presence of twin extra headphone outs for each channel on the back of the unit, meaning one can drive 3 sets of headphones from each of the 6 channels, for a total of 18 - and it actually CAN handle it, with no noticeable loss of level or power.
Sound quality is good and clean, but not spectacular (i.e. this is not a LittleLabs/R.Neve or SPL phones amp), build quality is good and clean although the pots seem a bit frail ... time will tell if they are rocker-proof!
Price/quality considered, it's a definite winner.