An addition to the 'avoid' category: the Onirii PD-06 lightweight SPD-SL compatible pedals recently featured on Trace Velo.
The weight matched the description, and they looked ok on first inspection. However, as others have reported, the grease is thick and sticky, resulting in very slow rotation back to the resting position. So I figured I'd replace that grease with some lighter grease and see if that'd improve the situation.
However, the nut that threads into the pedal body is made of cream cheese, and it disintegrated as soon as I tried to unscrew it. I made triple sure that I was turning in the correct direction and that I used a wrench that fit tight.
Interestingly, in Trace Velo's video, he doesn't actually show the step where he loosens this nut - he unscrews it, but he says he had already loosened it off camera. How he did that is a mystery to me.
AliExpress return & refund request submitted and approved.