I use both versions of the zumio, the s and x version. First, I use the x, which is the more intense version. I love how my clit swells, how you can see my hood and labia quiver when it meets the tip of the toy. Eventually, I use the s version. It is less intense, but has a much bigger head. I love both of their toys in their own way, but using both is so intense, my more clit starts to hide from such intensity. I love how my hole clenches and a lot of clit orgasms.