Just received this featureless brick (Kuu-sou ultrasoft onepoint kai) that was getting shit on for it's outward appearance in the previous thread right after I had ordered it.
I think it's actually pretty nice. The shape and weight combined with the ultrasoft material allow it to stretch a lot as you move it. I'm not sure if I could feel the different material strip in there. All I was looking for was an incredibly soft hole and this is exactly that.
I've seen some reviews saying that the previous versions are too soft to be used comfortably and that this version adds a slightly less soft material to the outer layer which makes it easier to handle. It's still so soft that it collapses under it's own weight but I had no issues with that during use.