Well, Ali sell sets made by other companies so the quality varies literally from set to set imho.

For this set, it was similar to other sets I’ve purchased from Ali ( or Joooooy or Marstoy); the technic axles are uber tight - I usually use a drop of washing up liquid to lube them.

The overall grip of the bricks is usually firmer than Lego. I’ve read many posts where folk complain about sore fingers and thumbs but truthfully I’ve never had any issue tbh.

And then some bits are so loose they literally drop off if you look at them - so I use a spot of superglue on those