I chose the Wisper Mystery because of its sleek and simple design. If you've read my other reviews, you know the bulbs were a selling point as well. It's 6 1/2" (5 1/4" insertable) of sturdy, non-porous, phthalates-free plastic. It has a twist cap with a button on the bottom to turn it off and on and to move through the three speeds. The larger bulb's circumference is 4 1/2" and the smaller one's is 3". The shaft's circumference is 3 1/4".

The Wisper Mystery is waterproof and there is an O-ring that helps to accomplish this. Any type of lube can be used with it. Soap and water or isopropyl alcohol is all it takes to clean the surface. Plastic cannot be boiled so please do not attempt to clean it that way.

The three speeds are basic low, medium and high, and they are generated by two AAA batteries. It's a medium-loud toy on its lowest setting and it grows considerably louder as you move on to the medium and highest settings. The sound is a very high buzz and makes the toy ticklish to the touch. This toy will definitely be heard through covers and a closed door. The powerful vibrations can be felt throughout the toy, but they are most prominent in the two bulbs.

The little bulb is especially nice for clitoral stimulation. If you angle the toy just right, the larger bulb can stimulate the g-spot. For me, that bulbs are definitely the main pleasure features. The shaft is not thick but the vibrations can be felt there as well.

I like the Wisper Mystery as a warm-up toy best, but I have successfully used it as a means to an end. I would give it five stars, but I decided to subtract one because of how noisy it is. Regardless, it's a good toy.