Conclusion
I believe the vibrating feature adds so much to this and isnt typically found on these types of devices. Other materials can be harsh and pinch skin when putting on but this particularly device does not do that. Its also light so can be worn a bit more easily for longer periods of time because of the plastic. Its also easy to slide in parts and turn the lock. Often other models are difficult to get the pieces to stay in place when locking the device. This one was far easier so it makes the experience much better and easier.
