This simple looking toy has seven levels of intensity and is very powerful when turned all the way up. The pictures advertise that the vibration is largely focused on one location of the machine; however, this is not actually the case. The whole unit vibrates with no points of higher intensity. This doesn't make this a bad toy, just that it doesn't work exactly as expected. It does still work well!
The "hook" over the top-side of the machine is attached on one side, which allows it to move and grip virtually any size member put into the toy. This hook is a good thumb grip for when the toy is used as a stroker. The vibrations are intense enough that it can be used dry without stroking.
One charge, via USB, seems to last a long time - even at the highest speed setting. There is no light indicator to tell us when the charge is needed, the device is being charged or when charging is complete. We have to guess in this matter. Of course, if it stops working, it probably needs a charge.
The toy is waterproof, which makes cleaning very easy. It has no areas where water and dirt can hide. Warm water and mild soap are all we need to clean.

The grip of this device allows it to simply hang around hands-free, while it does its job. It vibrates the penis and testicles when used this way. Using it as a lubricated stroker is nice, because then the vibration can be moved to "the right spot" as needed. The intensity of the whole machine vibration causes your hand to feel funny for a little while afterward.
Since this whole machine vibrates, we have used it for a massage with body and silicone safe oils. Placing my index and middle finger inside the device (under the hook), with my thumb on the other side of the hook, I am able to easily grip and maneuver the vibrator for giving my wife a massage. The firm, double-ridged bottom of the device works well for kneading muscles.
I imagine that for well-endowed men, this can be used in conjunction with the oral play.