Interesting, although given that they use skin/muscle cells it just looks like another potential source for graft material. I didn't see any mention of self-lubrication/cleaning. Completely speculating, but this particular option might have value in cisfemales with vaginal agenesis, precisely because they lack surplus material for grafting. That is not a problem for most of us. Still, three cheers for the hope it does offer for affected cis-females.