The AliExpress seller gave me this information. It's also confirmed by some reviews – the buyer was upset when he received 165mm cranks and found them to be 156mm Q Facrot (when he was expecting 146mm!!). This is why I negotiated with the seller before ordering. So, be careful.

That's strange because I thought that narrow q-factor was the reason people were buying these cranks in the first place. Or could it be that they have already sold out of all their 165mm road bike cranksets and are now passing 165mm mtb-cranksets as road variants?

I've been riding a 165mm crankset for a few months now, with a q-factor of ~146mm. Overall, I've been very satisfied. In terms of quality, they sit somewhere between the Lexxon and Elilee cranks. With these, I have not needed any spacers between the Favero pedals, which makes the q-factor even narrower. Axle sits sitffer in the bb than in Shimano cranksets and as a result they dont spin freely as easily but I don't think that makes even 0,1 watts difference.

I have not encountered any problems, except that installation was a pain in the ass, as there were no instructions available. I had to disassemble the cranks few times to fiddle with spacers and to get correct chainline. ATM I have couple of spacers on the driveside but NDS sits ~1,5mm closer to the frame. Maybe later I'll try to center both crankarms with different spider and extra set of spacers but for now on I've let it be as it doesn't make any difference.

You need to remove the coin, silly!
Sorry. I wanted to resist, but you tempted me ...
(Aka: Look what you made me do)

Just and armchair engineer diagnosis here: A few posts above, there is a picture of what seem to be spacers with the same pattern as the spider's interface. Maybe those have to be used? Really just guessing, I don't have the cranks.

Those photos are from BigRock crankset. I just recieved mine today and they came with spacers for spider.

From what I can tell these seem to be good quality and spindle isn't out of spec like some have reported to be the  case with other brands 24mm cranksets. I measured the q-factor to be ~146mm wich is ~1mm wider than advertised but it's still narrower than most cranksets offer.
Unfortunately I can't install them since bb I ordered is stuck in the mail sorting center. Hopefully I'm able to figure how to install them and chainline hits the spot.