The function of this vibrator is good enough, though in my experience, it does wear out too quickly. Just a short year after buying it, it decided I'd had enough and quit working. For the longest time, it just sat in a box collecting dust until my husband had the bright idea to try it on me anally. I don't like the cheap dial operation on this toy. After several battery changes, it becomes harder to keep the battery cover closed. Wear and tear will cause the threads to become weak and allow the battery cover to pop off. The toy wasn't too bad noisewise, but after the motor of the vibrator starts to weaken, it will become noticeably louder. While it was still new and the battery cover wasn't weakened by wear and tear, this thing performed very well while in the tub. But now that the cover is loose and worn out, it does allow water to leak in.