I actually don't mind/notice it when I'm stopped and then engage the gas pedal and the engine turns on. In this workflow, with the radio on, I barely even notice it. However, if I am stopped at a long light, the engine will turn off, but after a period of time it will turn back on while I'm still stopped. It seems that this is a different type of engine turn on as the car will slightly vibrate and I will notice it. I'm not a fan of it in this instance.