The trigger grip, gives more power than the traditional bulb pump. It will work to create a more effective vacuum seal in a shorter amount of time, so it will take less pump action to reach your desired level of hardness. It's easier to maintain control over the amount of pressure in the cylinder and a cheaper option than a pistol grip pump. It also has a more comfortable grip than the ball mechanism, meaning you can pump for longer without as much risk of cramping. This is a good compromise between price and power.