As a clit stimulator, I'd give this a 3/5. The material is ideal for a vibrator - hard and smooth. However, I would not recommend this for internal use. It's not as flexible as they advertise it to be and the permanent curve doesn't do much along the lines of hitting the G-spot. If you do intend to use this internally, I suggest using another vibrator for clit work. It'll get the job done, I promise.
For me, it was worth the money.