My Onirii brakes were (finally) delivered on Friday after spending 10 days in California. First impressions are good. The machining looks good, no obvious sharp edges or oil leaks. Interestingly, they are marked IIIPro on the inner side of the calipers. So may be these two are the same companies? Have installed them on my build but only rode the bike in our little cul-de-sac. I will report how they work, soon!

I am in the same boat.  I ordered 9 items on Nov 3rd.  6 or the 9 items have arrived.  I am waiting on a pair of carbon rims. (Still no tracking information on Aliexpress, but store swears they shipped right away.  A rear 148 MS hub, and Fat tire carbon front fork are also lagging way behind the rest of the items.)

The set of IIIPRO E4 Mountain Bike Brakes I ordered arrived in less than 10 days.

That’s the thing, $49 all in (for black color) is pretty good anyway you cut it. The Juin Techs are $150. Not sure of they are three times better than BR-05s?

Dang! Link please? Or rather timestamp if you remember. He talks a LOT!

I checked mine. They are same. Basically there is no distinction between front and rear, so when he says front caliper came with larger pads I'm baffled.

Then he switched pads to semi metallic ones which resulted in better performance, but we already know that.
Apart from that what else is there? Watched the whole thing and there is nothing related to setup as such.

I'm intrigued by the adapter used for rear caliper mount. What frame is it? Is that plate custom made?