Please, let me know via email when the new review on this product is available.
When I think rotation, I think a soft thick plastic, with the beads in tune. I wasn't expecting popping of the beads during rotation. I also thought that the vibration could have variety. The Rolling Stud did not offer any of those. In fact it was more of a rolling dud.
I truly love this toy. It may be a little large for some beginners. The long cord for the bullet makes this toy a bit more versatile then other similar models.