I own the wonder wave ICE insert. It's basically Cyberskin feel when powdered down with TALC powder or Corn Starch.
Fleshlights are fun... Theyre expensive though.
I'm slowly saving up for my next Fleshlight, which will be the STU. The FleshJack is the male butt version, but just for simplicity, I'll probably get the vagina one. Can't hurt to try it, right?
Unfortunately the STU insert is NOT available seperately, so I can't use my existing case.
I have a video in my profile of me using my ICE insert.