I miss my old model without the safety switch!  It's just too much trouble to have to depress that button everytime i engage the motor.  Otherwise, it is a wonderful product for making smoothies, immersion blending, etc., and it is helpful that the blending stick detaches from the main blender so that you can put it into the sink, dishwasher, etc for cleaning and not have to worry about immersing and ruining the motor.