Packaging
Compared to the M4 and M42, the packaging has been revised. Similarly to the first Model O packaging, the mouse sits on an inlay, with everything else stored underneath. Aside from the mouse, one finds a set of replacement mouse feet, sticker, quick start guide, and some words from Rocket Jump Ninja in the box.
Weight
My scale shows around 59 g (+/- 1 g), which is slightly more than what Xtrfy claims—Xtrfy measures the weight without the cable, I'm measuring it with the cable. Either way, the MZ1 is a very light mouse, though one needs to keep in mind that it is very much small-sized. In addition to that, the mouse is slightly front-heavy. What's noticeable is how thick the plastic is. I figure it would've been possible to achieve the same or an even lower weight by omitting the holes but using thinner plastic.
Cable
The MZ1 features a paracord-like, braided cable. Called EZcord Pro by Xtrfy, it has been much improved over the old Ezcord featured on the M4 and M42 in terms of flexibility. Though not quite on the same level as the Endgame Gear XM1r or HyperX Pulsefire Haste cable, it is firmly above average. The stress relief points upwards, similarly to recent Zowie or VAXEE releases. The cable has a ferrite bead attached, which reduces signal noise, as well as a gold-plated USB connector. Its measured length is 1.80 m.
Feet
The MZ1 comes with white-dyed pure PTFE (Teflon) feet with slightly rounded edges. They are of above average thickness and glide very well. Small indentations next to the feet make them easy to remove. Xtrfy includes a set of replacement mouse feet in the box, which is always very handy. Also included is an additional sensor ring, which may be applied to ensure CPI stays consistent upon applying vertical pressure.