Hi, Just got mine, Hooray!!! MX-BLUE+RED led,
Bought it in massdrop bazaar, ordered on 9/3/2015 got it a 16/3/2015 super fast (i am in israel, so a week is fast).
Overall i think the build quality is BAD, i thought it was defective until i found it it has flimsy mini usb connector making it go on/off so i've replaced the the cable to a more rigid one and now it is working but i must be carful when i move it not to lose the spot.
sometimes when i connect it, i get 3 blinks and i try again and again until it works
When it works,It works on all of my platforms(pc,mac and ubunto).
NO manual at all, besides a small card with a serial number, for all the FN+F keys, need to look it over the net to find what is reset/key brightness and more...
The wireless works ok although the receiver look like an old generation one(something from the 80's and not a more nano type receiver that i would expect in 2015)
And NO backlight when in wireless mode WTF!!!
Over all, i give it 5/10
when it works it works, but if i lose the cable spot its a BRICK!.