I’ve never used them for reborning, but I have for painting. They stay wet for a lot longer than regular acrylics. So the benefit is longer open time without adding retarder- which risks loss of adhesion (you’d counteract that by also adding a medium). In painting it’s great because your paints can remain bright, vibrant, and opaque since you don’t have to add those clear extras which increase transparency. But of course for reborning we want them transparent
I would imagine they’d be good for those who like the working characteristics of GHSP-- but they might dry too slowly for those used to regular acrylics? You’d probably have to work on a few dolls at a time because each later would take a while to dry. But you’d have a lot more time to correct mistakes and blend.
I’m curious to know how they work for reborning as well!