I haven't tried them but...I know about winding.
I'm working in an industry that winds transformers.
And I know that a good winding machine winds much more better than what you can do by hand.
Maybe these pups are good cause the person seems to know what he's doing but the whole thing about hand winding is only for advertisement.
I wound too by hand but it make sense only when you wind with thick wires.All the pups are with thin or very thin wires.You can't control thin wires by hand.New well designed winding machines can wind very well wires down to 0.05mm!
Notice that I'm saying new well designed machines.So maybe Leo Fender was right but maybe he was reffering to old machines. 😆
Anyway I don't want to be bad.Maybe these pups are good and seems that they are.But the whole thing about hand winding doesn't make sense to me.