While many gamers will most likely find the amped speaker system to be the most impractical feature of the unit (the NGPC is certainly loud enough for most people without any adjustments, and the Shock 'n' Rock can make it much, MUCH louder), the vibration function definitely makes things more interesting. However, the rubber grips and A/C adapter are the best parts of this device by far, adding welcome comfort and more playing room for your hands, and greatly increasing the amount of possible playing time for your NGPC.