Yes it does have some problem on manufacturing as I observed myself.I think coolprops still can not get things good enough but I am still happy for the museum pose and the accuracy.The portrait is really really accurate that can not be fond in any other Alien product by now.
I can't the actual weight of this piece but it is not light at all.I think vinyl is good than PVC because the most of it are still hand made while PVC are casted and painted by machine.There remains some value in vinyl but everything depends on it turns out good.