Haven't seen much which addressed these items. But, I asked a lady if she was interested. And, without hesitation she agreed to try it out as a new experience for both of us.  Oh it worked VERY well for both.  Play around, then insert, play around some more, fully engage etc., etc.  it was great and much easier to dispose of. She had good sensations, and I found it was so much better than the male version....it was almost like bareback for us both. The extra cost? Not much and could be compensated for.  Numerous UTube videos are very good for explanations and demonstrations.