I wasn't sure how to hold it -- which side was "up"? Nothing seemed sized or shaped the way I was.
So I decided to experiment and see what I liked. I'm sure that the reason for the lack of direction is to encourage us to do just that, since there's no wrong way to use it. It was fun to experiment, but ultimately unsatisfying.
I found more to dislike than to like, even if I were to be forgiving about the name. If I pressed with the end where I was feeling the strongest vibrations, it sort of pinched delicate tissue. The concave position was too light for sensation, and the ridge was more irritating than stimulating.
Usually if I don't like a toy personally, I try to figure out who would like it. If it's too light for me, would it be good for a first timer? Not with this complicated, non-intuitive shape. If it didn't fit my physiology, would it fit someone else's? Darned if I know. (Let me know if you found it just right for you.)

Even though I couldn't find much to like about using the Bsoft, it does have its attributes: rechargeable, waterproof, easy-to-use controls, easy to clean. very lightweight for travel.
Thank you, Eden Fantasys for sending me the Bsoft -- sorry I didn't like it better!