I have purchased this from Null-Audio. I also own the Audio-Technica ATH-IM70 Dual symphonic-driver In-ear Monitor. It came shipped on time, and in a nice presentation box with what you need to start with. The soft 'flex' tips provided are better than T-500 Comply tips (which tends to 'blunt' the bass, if that makes sense). The in-ears are well built, and solid metal cased.
Nebula One is easy to drive with iPhone 6. Cables do appear to be tangle-free.
It sounds better than the ATH-IM70, and only cost slightly more (at the promo price offered by Null Audio). Better in these areas: instrument separation, sound stage.
Fit could be better: it fits better over-ear, but for my fit, the wire-hook doesn't 'hug' the ears fully, but it doesn't fall off either.