Got mine on aliexpress ~6 mounth ago, now it's my main keeb.
Case is well manufactured thick aluminium, pcb/hot swap inserts are solid, does not work with QMK as far as i know but bootmapper is doing the job, backlighting leds works nicely and are configurables with some animations on the bootmapper (Can have 4 backlight settings + off on the pcb memory). Layout is pretty simple, the only complain is mini-usb but it's worth it if you don't plan spending your whole budget on a custom cable.
Left shift is 2u, left space 2.25u and right space 2.75u. The rest of the layout is pretty straight forward, so the compatibility is pretty great for what it is.