I wanted to like this toys more than I do. I find that while it is technically dual firmness, it is still very firm, whereas most other duals I own are soft, but rigid. I can't know for certain, but it feels as though the inner core takes up most of the space inside, leaving only a small portion of the toy to be the softer silicone.
The firmness makes this toy almost unusable for me.
[Vaginal user]