This vibrating prostate toy is absolutely fantastic! It's great for using solo or with a partner. It was my first time trying out a toy like this, and I must say, I am thoroughly impressed. My partner had a blast controlling it the first time we used it together. But even when I use it alone, it's still a lot of fun. The perfect size gives me an incredible feeling of fullness without being uncomfortably large. For reference, the insertable part is smaller than the Billy. Overall, this toy has quickly become one of my favourites!