Pros: Fairly powerful, but not quite as powerful as the Hitachi Magic Wand.
The adjustable roll dial is a nice feature compared to only a high and low switch on the Hitachi Magic Wand. With this feature, you can adjust the vibration level exactly where you want it or continuously throttle it up and down for another nice effect.
Cons: Because of the grooves in the massager head, it's more difficult to thoroughly clean compared to the Hitachi Magic Wand